Evaluate the indefinite integral by using the given substitution to reduce the integral to standard form. 121° dr S u=6-14 16-4

Answers

Answer 1

The indefinite integral evaluates to:

[tex](1/14)(7r^2 + 140r - 20 + C)[/tex]

To evaluate the indefinite integral ∫121° dr, using the given substitution u = 6 - 14r - 4, we need to find the derivative of u with respect to r, and then substitute u and du into the integral.

Given: u = 6 - 14r - 4

Differentiating u with respect to r:

du/dr = -14

Now, we can substitute u and du into the integral:

∫121° dr = ∫(u/du) dr

Substituting u = 6 - 14r - 4 and du = -14 dr:

∫(6 - 14r - 4)/(-14) du

Simplifying the integral:

-1/14 ∫10 - 14r du

Integrating each term:

[tex]-1/14 [10u - (14/2)r^2 + C][/tex]

Simplifying further:

[tex]-1/14 [10(6 - 14r - 4) - (14/2)r^2 + C]\\-1/14 [60 - 140r - 40 - 7r^2 + C]\\-1/14 [-7r^2 - 140r + 20 + C]\\[/tex]

The indefinite integral ∫121° dr, using the given substitution u = 6 - 14r - 4, simplifies to:

[tex]-1/14 (-7r^2 - 140r + 20 + C)[/tex]

Therefore, the indefinite integral evaluates to:

[tex](1/14)(7r^2 + 140r - 20 + C)[/tex]

Note: The constant of integration is represented by C.

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Related Questions

Find the difference.
(−11x3−4x2+5x−18)−(4x3−2x2−x−19)"

Answers

The difference between the two polynomials, (-11x^3 - 4x^2 + 5x - 18) and (4x^3 - 2x^2 - x - 19), is (−15x^3 + 2x^2 + 6x + 1). In summary, the difference of the two polynomials is given by the polynomial -15x^3 + 2x^2 + 6x + 1.

To calculate the difference, we subtract the second polynomial from the first polynomial term by term. (-11x^3 - 4x^2 + 5x - 18) - (4x^3 - 2x^2 - x - 19) can be rewritten as -11x^3 - 4x^2 + 5x - 18 - 4x^3 + 2x^2 + x + 19. We then combine like terms to simplify the expression: (-11x^3 - 4x^3) + (-4x^2 + 2x^2) + (5x + x) + (-18 + 19).

This simplifies further to -15x^3 + 2x^2 + 6x + 1. Therefore, the difference of the two polynomials is -15x^3 + 2x^2 + 6x + 1.

In summary, the difference of the two polynomials is given by the polynomial -15x^3 + 2x^2 + 6x + 1.

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If n = 290 and p (p-hat) = 0,85, find the margin of error at a 99% confidence level. __________ Round to 4 places. z-scores may be rounded to 3 places or exact using technology.

Answers

The margin of error at a 99% confidence level, given n = 290 and p-hat = 0.85, is approximately 0.0361.

To calculate the margin of error, we need to find the critical z-score for a 99% confidence level. The formula to calculate the margin of error is:

Margin of Error = z * sqrt((p-hat * (1 - p-hat)) / n)

Here, n represents the sample size, p-hat is the sample proportion, and z is the critical z-score.

First, we find the critical z-score for a 99% confidence level. The critical z-score can be found using a standard normal distribution table or a statistical calculator. For a 99% confidence level, the critical z-score is approximately 2.576.

Next, we substitute the values into the formula:

Margin of Error = 2.576 * sqrt((0.85 * (1 - 0.85)) / 290)

Calculating the expression inside the square root:

0.85 * (1 - 0.85) = 0.1275

Now, substituting this value and the other values into the formula:

Margin of Error = 2.576 * sqrt(0.1275 / 290) ≈ 0.0361

Therefore, the margin of error at a 99% confidence level is approximately 0.0361 when n = 290 and p-hat = 0.85.

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Use the four-step process to find f'(x) and then find f (1), f'(2), and f'(3). 8x f(x) = 9 + x - 6 f'(x) =f'(1) =

Answers

The f'(x) is f'(3) = 15.

To find f'(x) for the given function f(x) = 9x + x^2 - 6, we can follow the four-step process of differentiation.

Step 1: Identify the function f(x).

In this case, the function is f(x) = 9x + x^2 - 6.

Step 2: Use the power rule to differentiate each term.

The power rule states that the derivative of x^n, where n is a constant, is nx^(n-1).

Differentiating each term, we get:

f'(x) = d/dx (9x) + d/dx (x^2) - d/dx (6)

The derivative of 9x is simply 9.

For x^2, we apply the power rule. The derivative of x^2 is 2x^(2-1) = 2x.

The derivative of a constant term (-6) is zero.

Putting it all together, we have:

f'(x) = 9 + 2x - 0

f'(x) = 2x + 9

Step 3: Evaluate f'(x) at specific values.

To find f'(1), we substitute x = 1 into the derived expression:

f'(1) = 2(1) + 9

f'(1) = 2 + 9

f'(1) = 11

Therefore, f'(1) = 11.

Step 4: Find f(x) at specific values.

To find f(1), we substitute x = 1 into the original function:

f(1) = 9(1) + (1)^2 - 6

f(1) = 9 + 1 - 6

f(1) = 4

Therefore, f(1) = 4.

To find f'(2), we substitute x = 2 into the derived expression:

f'(2) = 2(2) + 9

f'(2) = 4 + 9

f'(2) = 13

Therefore, f'(2) = 13.

To find f'(3), we substitute x = 3 into the derived expression:

f'(3) = 2(3) + 9

f'(3) = 6 + 9

f'(3) = 15

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Names jocelynn and i was wondering what is the name of the process of rewriting a quadratic equation so that one side is a perfect square trinomial?
i said completing the square but that was not it

Answers

The square is a useful technique in various mathematical applications, such as solving quadratic equations,  the Vertex of a parabola, or converting a quadratic equation into vertex form

The process of rewriting a quadratic equation so that one side is a perfect square trinomial is indeed called "completing the square." It is a technique used to solve quadratic equations and also to convert them into a specific form that makes further manipulation easier.

Completing the square involves manipulating the quadratic equation by adding or subtracting a constant term in order to create a perfect square trinomial on one side of the equation. The goal is to express the quadratic equation in the form of (x + p)² = q, where p and q are constants.

The steps to complete the square for a quadratic equation in the form ax² + bx + c = 0 are as follows:

1. Divide the equation by the coefficient of x², so that the coefficient becomes 1.

2. Move the constant term (c) to the other side of the equation.

3. Add the square of half the coefficient of x to both sides of the equation.

4. Factor the perfect square trinomial on the left side of the equation.

5. Take the square root of both sides of the equation.

6. Solve for x by setting up two separate equations, one positive and one negative.

Completing the square is a useful technique in various mathematical applications, such as solving quadratic equations, finding the vertex of a parabola, or converting a quadratic equation into vertex form. It allows for easier analysis and simplification of quadratic expressions and helps in understanding the properties of quadratic functions.

In summary, completing the square is the name of the process used to rewrite a quadratic equation so that one side is a perfect square trinomial. It involves manipulating the equation to create a squared binomial expression, making it easier to solve or analyze the quadratic equation.

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3) (8 points) Given 2 parabolas equations y = 6x - x² and y=x² a) Graph the functions: ai nousupo viqque-song 2+ ←++ + 10 x -2+ b) Find relevant intersection points. -10 -8 -6 2 4 6 8

Answers

The relevant intersection points are (0, 0) and (3, 9). By plotting the graphs and finding the relevant intersection points.

To graph the given functions y = 6x - x² and y = x², we can plot points on a coordinate plane and connect them to form the parabolas.

a) Graphing the functions:

First, let's create a table of x and y values for each function:

For y = 6x - x²:

x   |   y

-----------

-2  |  -2

-1  |   7

0   |   0

1   |   5

2   |   4

For y = x²:

x   |   y

-----------

-2  |   4

-1  |   1

0   |   0

1   |   1

2   |   4

Now, plot the points on the coordinate plane and connect them to form the parabolas. The graph should look like this:

  |

  |           y = 6x - x²

  |

  |       x

---|-----------------------

  |

  |

  |

  |

  |       y = x²

  |

b) Finding intersection points:

To find the intersection points, we need to solve the equations y = 6x - x² and y = x² simultaneously. Set the equations equal to each other:

6x - x² = x²

Simplify the equation:

6x = 2x²

Rearrange the equation:

2x² - 6x = 0

Factor out common terms:

2x(x - 3) = 0

Set each factor equal to zero:

[tex]2x = 0 - > x = 0[/tex]

[tex]x - 3 = 0 - > x = 3[/tex]

So, the relevant intersection points are (0, 0) and (3, 9).

The graph should show the points of intersection as well.

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d Find (2213) x2. dx d (x2/3) = 0 dx (Type an exact answer.)

Answers

To find the derivative of (2x^(1/3))^2 with respect to x, we can apply the chain rule. The derivative is 4/3 x^(-1/3).

Let's break down the expression (2x^(1/3))^2 to simplify the derivative calculation. First, we can rewrite it as (2^2)(x^(1/3))^2, which is equal to 4x^(2/3). To find the derivative of 4x^(2/3) with respect to x, we apply the power rule. The power rule states that if f(x) = x^n, then the derivative of f(x) with respect to x is n * x^(n-1). Using the power rule, the derivative of x^(2/3) is (2/3)x^((2/3)-1), which simplifies to (2/3)x^(-1/3). Next, we multiply the derivative of x^(2/3) by the constant 4, yielding (4/3)x^(-1/3). Therefore, the derivative of (2x^(1/3))^2 with respect to x is 4/3 x^(-1/3). Derivatives are defined as the varying rate of change of a function with respect to an independent variable. The derivative is primarily used when there is some varying quantity, and the rate of change is not constant. The derivative is used to measure the sensitivity of one variable (dependent variable) with respect to another variable (independent variable).

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2. Find the volume of the solid generated by rotating the region enclosed by : = y² – 4y + 4 and +y= 4 about (a): x = 4; (b): y = 3.

Answers

(a)  Volume of the solid generated by rotating the region enclosed by = y² – 4y + 4 and +y= 4 when x = 4 is (1408/15)π cubic units.

To find the volume of the solid generated by rotating the region enclosed by the curve y² - 4y + 4 and x = 4 about the line x = 4, we can use the method of cylindrical shells.

The volume can be calculated using the formula:

V = ∫[a,b] 2πx f(x) dx,

where [a, b] is the interval of integration and f(x) represents the height of the shell at a given x-value.

In this case, the interval of integration is [0, 4], and the height of the shell, f(x), is given by f(x) = y² - 4y + 4.

To express the curve y² - 4y + 4 in terms of x, we need to solve for y:

y² - 4y + 4 = x

Completing the square, we get:

(y - 2)² = x

Taking the square root and solving for y, we have:

y = 2 ± √x

Since we want to find the volume within the interval [0, 4], we consider the positive square root:

y = 2 + √x

Therefore, the height of the shell, f(x), is:

f(x) = (2 + √x)² - 4(2 + √x) + 4

     = x + 4√x

Now we can calculate the volume:

V = ∫[0,4] 2πx (x + 4√x) dx

Integrating term by term:

V = 2π ∫[0,4] (x² + 4x√x) dx

Using the power rule of integration:

V = 2π [(1/3)x³ + (8/5)x^(5/2)] evaluated from 0 to 4

V = 2π [(1/3)(4)³ + (8/5)(4)^(5/2)] - 2π [(1/3)(0)³ + (8/5)(0)^(5/2)]

V = 2π [(1/3)(64) + (8/5)(32)] - 0

V = 2π [(64/3) + (256/5)]

V = 2π [(320/15) + (384/15)]

V = 2π (704/15)

V = (1408/15)π

Therefore, the volume of the solid generated by rotating the region enclosed by y² - 4y + 4 and x = 4 about the line x = 4 is (1408/15)π cubic units.

(b) Volume of the solid generated by rotating the region enclosed by : = y² – 4y + 4 and +y= 4 when y = 3 is 370π cubic units.

The volume can be calculated using the formula:

V = ∫[a,b] 2πx f(y) dy,

where [a, b] is the interval of integration and f(y) represents the height of the shell at a given y-value.

In this case, the interval of integration is [1, 4], and the height of the shell, f(y), is given by f(y) = y² - 4y + 4.

Now we can calculate the volume:

V = ∫[1,4] 2πx (y² - 4y + 4) dy

Integrating term by term:

V = 2π ∫[1,4] (xy² - 4xy + 4x) dy

Using the power rule of integration:

V = 2π [(1/3)xy³ - 2xy² + 4xy] evaluated from 1 to 4

V = 2π [(1/3)(4)(4)³ - 2(4)(4)² + 4(4)(4)] - 2π [(1/3)(1)(1)³ - 2(1)(1)² + 4(1)(1)]

V = 2π [(64/3) - 32 + 64] - 2π [(1/3) - 2 + 4]

V = 2π [(64/3) + 32] - 2π [(1/3) + 2 + 4]

V = 2π [(64/3) + 32 - (1/3) - 2 - 4]

V = 2π [(192/3) + 96 - 1 - 6]

V = 2π [(288/3) + 89]

V = 2π [(96) + 89]

V = 2π (185)

V = 370π

Therefore, the volume of the solid generated by rotating the region enclosed by y² - 4y + 4 about the line y = 3 is 370π cubic units.

Hence we can say that,

(a) The volume of the solid generated by rotating the region enclosed by y² - 4y + 4 and x = 4 about the line x = 4 is (1408/15)π cubic units.

(b) The volume of the solid generated by rotating the region enclosed by y² - 4y + 4 about the line y = 3 is 370π cubic units.

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Question 4 < Use linear approximation, i.e. the tangent line, to approximate √64.3. Let f(x)=√x. A. Find the equation of the tangent line to f(x) at a = 64. L(x) = B. Using the linear approximatio

Answers

Using linear approximation, we can approximate the value of √64.3 by finding the equation of the tangent line to the function f(x) = √x at a = 64. The linear approximation provides an estimate that is close to the actual value.

To find the equation of the tangent line to f(x) at a = 64, we need to determine the slope of the tangent line and a point on the line. The slope of the tangent line is equal to the derivative of f(x) at a = 64. Taking the derivative of f(x) = √x using the power rule, we get f'(x) = 1/(2√x). Evaluating f'(x) at x = 64, we find that f'(64) = 1/(2√64) = 1/16.

Now that we have the slope of the tangent line, we need a point on the line. Since the tangent line passes through the point (64, f(64)), we can substitute x = 64 into the original function f(x) = √x to find the corresponding y-coordinate. Therefore, f(64) = √64 = 8.

Using the point-slope form of a linear equation, y - y1 = m(x - x1), where m is the slope and (x1, y1) is a point on the line, we can plug in the values we found: y - 8 = (1/16)(x - 64). Simplifying the equation gives us the equation of the tangent line: L(x) = (1/16)x - 4.

Now, to approximate the value of √64.3 using the linear approximation, we substitute x = 64.3 into the equation of the tangent line L(x). This gives us L(64.3) = (1/16)(64.3) - 4 ≈ 4.01875.

Therefore, using linear approximation, we approximate √64.3 to be approximately 4.01875.

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Suppose the society's preferences (w) for quantity (g) and variety (n) can be
categorized by the following equation:
W = 4gn The economy has 200 units of input. Each unit of output can be produced at a constant MC of 2, and the fixed cost is 10. What is the optimum output-variety
combination?

Answers

The optimum output variety combination would be achieved by producing 100 units of output with a variety level of 50, which is 0.975.

Determining the optimal combination of yield and diversity requires maximizing social preferences, as expressed by the equation W = 4gn. where W is social preference, g is quantity, and n is diversity.

Assuming the economy has 200 input units, we can find the total cost (TC) by multiplying the input unit by 2, the definite marginal cost (MC).

TC = MC * input = 2 * 200 = 400.

Total cost (TC) is made up of fixed cost (FC) plus variable cost (VC).

TC = FC + VC.

Fixed costs are given as 10, so variable costs (VC) can be calculated as:

VC = TC - FC = 400 - 10 = 390.

Finding the optimal combination of yield and diversity requires maximizing the social preference function given available inputs and given cost constraints for output variety. The formula for the social preference function is W = 4gn.

We can rewrite this equation in terms of the input (g).

g = W/(4n).

Substituting variable cost (VC) and constant marginal cost (MC) into the equation, we get:

[tex]g=(VC/MC)/(4n)=390/(2*4n)=97.5/n.[/tex]

To maximize the social preference, we need to find the value of n that makes the set g as large as possible. Since the magnitude n cannot exceed 100 (because the quantity g cannot exceed 200), 100 is the maximum value of n that satisfies the equation. Substituting n = 100 into the equation g = 97.5 / n gives:

g = 97.5/100 = 0.975.


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20 POINTS

Simplify the following expression:

Answers

Answer:

[tex]144a^8g^14[/tex]

Step-by-step explanation:

the powers are 8 and 14

a bicycle has an average speed of 8.00 km/h. how far will it travel in 10.0 seconds

Answers

The bicycle will travel approximately 0.022 kilometers in 10.0 seconds at an average speed of 8.00 km/h.

To calculate the distance traveled by a bicycle in 10.0 seconds with an average speed of 8.00 km/h, we need to convert the time from seconds to hours to match the unit of the average speed.

Given:

Average speed = 8.00 km/h

Time = 10.0 seconds

First, we convert the time from seconds to hours:

10.0 seconds = 10.0/3600 hours (since there are 3600 seconds in an hour)

10.0 seconds ≈ 0.0027778 hours

Now, we can calculate the distance using the formula:

Distance = Speed × Time

Distance = 8.00 km/h × 0.0027778 hours

Distance ≈ 0.0222222 km

Therefore, the bicycle will travel approximately 0.022 kilometers in 10.0 seconds at an average speed of 8.00 km/h.

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Subtract
7
x
2

x

1
7x
2
−x−1 from
x
2
+
3
x
+
3
x
2
+3x+3.

Answers

The answer is [tex]-6x^2+2x+2[/tex]. To subtract [tex]7x^2-x-1[/tex] from [tex]x^2+3x+3[/tex], we need to first distribute the negative sign to each term in [tex]7x^2-x-1.[/tex]

In algebra, an equation is a mathematical statement that asserts the equality between two expressions. It consists of two sides, often separated by an equal sign (=).

The expressions on each side of the equal sign may contain variables, constants, and mathematical operations.

Equations are used to represent relationships and solve problems involving unknowns or variables. The goal in solving an equation is to find the value(s) of the variable(s) that make the equation true.

This is achieved by performing various operations, such as addition, subtraction, multiplication, and division, on both sides of the equation while maintaining the equality.

Here, it gives us [tex]-7x^2+x+1[/tex]. Now we can line up the like terms and subtract them.
[tex]x^2 - 7x^2 = -6x^2[/tex]
3x - x = 2x
3 - 1 = 2

Putting these results together, we get:
[tex]x^2+3x+3x^2 - (7x^2-x-1) = -6x^2+2x+2[/tex]

Therefore, the answer is [tex]-6x^2+2x+2.[/tex]

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Find the point at which the line meets the plane X= 2+51 y=1 +21,2 = 2.4t x + y +z = 16 The point is (xy.z) (Type an ordered triple.)

Answers

The point at which the line defined by[tex]x = 2 + 51t, y = 1 + 21t[/tex], and [tex]z = 2.4t[/tex] meets the plane defined by[tex]x + y + z = 16[/tex] is [tex](44, 22, -50)[/tex].

To find the point of intersection, we need to equate the equations of line and the plane. By substituting the values of x, y, and z from the equation of the line into the equation of plane, we can solve for the parameter t.

Substituting [tex]x = 2 + 51t, y = 1 + 21t[/tex], and [tex]z = 2.4t[/tex] into the equation [tex]x + y + z = 16[/tex], we have:

[tex](2 + 51t) + (1 + 21t) + (2.4t) = 16[/tex]

Simplifying the equation, we get:

[tex]2 + 51t + 1 + 21t + 2.4t = 16\\74.4t + 3 = 16\\74.4t = 13[/tex]

t ≈ 0.1757

Now that we have the value of t, we can substitute it back into the equations of the line to find the corresponding values of x, y, and z.

x = 2 + 51t ≈ 2 + 51(0.1757) ≈ 44

y = 1 + 21t ≈ 1 + 21(0.1757) ≈ 22

z = 2.4t ≈ 2.4(0.1757) ≈ -50

Therefore, the point at which the line intersects the plane is (44, 22, -50).

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if f and g are differentiable functions so that f(0)=2,
f'(0)=-5,g(0)=-3,g'(0)=7. Evaluate what (f/g)'(0) would be.

Answers

if f and g are differentiable functions so that f(0)=2,f'(0)=-5,g(0)=-3,g'(0)=7 (f/g)'(0) would be 29/9.

A differentiable function is a mathematical function that has a derivative at every point within its domain. The derivative of a function represents the rate at which the function's value changes with respect to its input variable.

Formally, a function f(x) is said to be differentiable at a point x = a if the following limit exists:

f'(a) = lim (h→0) [f(a + h) - f(a)] / h

where f'(a) represents the derivative of f(x) at x = a. If the derivative exists at every point in the function's domain, then the function is said to be differentiable over that domain.

To find (f/g)'(0), we need to use the quotient rule for derivatives:

(f/g)'(x) = [f'(x)g(x) - f(x)g'(x)] / [g(x)]^2

Then, we can evaluate the derivative at x = 0:

(f/g)'(0) = [f'(0)g(0) - f(0)g'(0)] / [g(0)]^2

Substituting the given values, we get:

(f/g)'(0) = [(−5)(−3)−(2)(7)] / [−3]^2

(f/g)'(0) = [15−(−14)] / 9

(f/g)'(0) = 29/9

Therefore, (f/g)'(0) = 29/9.

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The two-way table below shows the results of a survey where participants were asked
grade level and their favorite season. Fill in the blank spaces of the table and use the res
the survey to mark each statement as true or false,
F
8TH
9TH
TOTAL
SUMMER
104
197
301
FALL
200
298
WINTER
200
45
356
SPRING
118
163
LLE
TOTAL
500
500
1,000
6. A total of 301 people were surveyed.
7. Both 8th and qth grade participants preferred winter the least.
8. 20 more participants preferred spring over summer,
F
9. There was an equal number of 8th and 9th graders surveyed.
10. The most popular season among the 8th graders surveyed was summer.

Answers

We can see here that from the given information, filling in the blank spaces, we have:

6.  False

7. False

8. True

9. True

10. False

What is a survey?

A survey is a research technique that is used to acquire data and information from a particular group or sample of people. It entails formulating a sequence of questions to elicit information on people's beliefs, attitudes, actions, or traits.

Online questionnaires, paper-based forms, telephone interviews, in-person interviews, or a combination of these techniques can all be used to conduct surveys.

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6) [10 points] Evaluate the indefinite integral. Show all work leading to your answer. ſarcsin(x)dx

Answers

The antiderivative of arcsin(x) is x * arcsin(x) - sqrt(1 - x^2) + C, where C is the constant of integration.

To evaluate the integral ∫arcsin(x) dx, we can use the method of integration by parts. Integration by parts involves choosing two functions, u and dv, such that their derivatives du and v can be easily computed. The formula for integration by parts is ∫u dv = uv - ∫v du.

Let's choose u = arcsin(x) and dv = dx. Taking the derivatives, we have du = 1/sqrt(1 - x^2) dx and v = x.

Using the formula for integration by parts, we have ∫arcsin(x) dx = uv - ∫v du. Substituting the values, we get ∫arcsin(x) dx = x * arcsin(x) - ∫x * (1/sqrt(1 - x^2)) dx.

To evaluate the remaining integral, we can make a substitution. Let's substitute u = 1 - x^2, which gives du = -2x dx. Rearranging, we have -1/2 du = x dx.

Substituting these values, we have ∫arcsin(x) dx = x * arcsin(x) - ∫(1/2) * (1/sqrt(u)) du.

Simplifying, we have ∫arcsin(x) dx = x * arcsin(x) - (1/2) ∫(1/sqrt(u)) du.

Integrating the term (1/sqrt(u)), we get ∫(1/sqrt(u)) du = 2 * sqrt(u).

Substituting back u = 1 - x^2, we have ∫(1/sqrt(u)) du = 2 * sqrt(1 - x^2).

Finally, we have ∫arcsin(x) dx = x * arcsin(x) - (1/2) * 2 * sqrt(1 - x^2) + C = x * arcsin(x) - sqrt(1 - x^2) + C.

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Can you show the calculation of a and b? a - 1 78 218-4 -4|| 5.5 3 42.5) 41 a=1.188 b=0.484 y=1.188+0.484x

Answers

Using any suitable method (substitution or elimination), we can solve for a and b. The resulting values will give us the calculated values of a and b.

What is the system of equations?

A system of equations is a collection of one or more equations that are considered together. The system can consist of linear or nonlinear equations and may have one or more variables. The solution to a system of equations is the set of values that satisfy all of the equations in the system simultaneously.

To calculate the values of a and b, we can use the given data points (x, y) = (1.78, 21.84) and (-4, -4).

We have the equation y = a + bx, where y is the dependent variable and x is the independent variable.

Using the first data point (1.78, 21.84), we can substitute the values into the equation:

21.84 = a + b(1.78)

Similarly, using the second data point (-4, -4):

-4 = a + b(-4)

Now we have a system of two equations:

1) a + 1.78b = 21.84

2) a - 4b = -4

To solve this system of equations, we can use any method such as substitution or elimination.

Using the elimination method, we can multiply equation 2 by 1.78 to eliminate the variable a:

1.78(a - 4b) = 1.78(-4)

1.78a - 7.12b = -7.12

Now we can subtract equation 1 from this modified equation:

(1.78a - 7.12b) - (a + 1.78b) = -7.12 - 21.84

1.78a - a - 7.12b - 1.78b = -28.96

0.78a - 8.9b = -28.96

Simplifying the equation further, we get:

0.78a - 10.68b = -28.96

Now we have a new equation:

3) 0.78a - 10.68b = -28.96

We can now solve equations 2 and 3 as a system of linear equations:

2) a - 4b = -4

3) 0.78a - 10.68b = -28.96

Hence,

Using any suitable method (substitution or elimination), we can solve for a and b. The resulting values will give us the calculated values of a and b.

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a 1. Find the vector area clement dĀ for a surface integral over cach of the following parameterized surfaces in R, and say which direction it points. (a) For P(s, t) = si +t3 +K with 8,t € [0,1],

Answers

The vector area element [tex]\mathbf{dA} is -3t^2\mathbf{j} \, ds \, dt[/tex]. It points in the negative y direction

To find the vector area element [tex]\mathbf{dA}[/tex] for a surface integral over the parameterized surface [tex]P(s, t) = si + t^3 + \mathbf{K}[/tex], where s, t  [0, 1], we can use the cross product of the partial derivatives of $P$ with respect to s and t. The vector area element is given by:

[tex][\mathbf{dA} = \left|\frac{\partial P}{\partial s} \times \frac{\partial P}{\partial t}\right| \, ds \, dt\]][/tex]

Let's calculate the partial derivatives of P:

[tex]\[\frac{\partial P}{\partial s} = \mathbf{i}\]\[\frac{\partial P}{\partial t} = 3t^2\mathbf{j}\][/tex]

Now, we can compute the cross-product:

[tex]\[\frac{\partial P}{\partial s} \times \frac{\partial P}{\partial t} = \begin{vmatrix} \mathbf{i} & \mathbf{j} & \mathbf{k} \\ 1 & 0 & 0 \\ 0 & 3t^2 & 0 \end{vmatrix} = -3t^2\mathbf{j}\][/tex]

Therefore, the vector area element [tex]\mathbf{dA} is -3t^2\mathbf{j} \, ds \, dt[/tex]. It points in the negative y direction.

Note: In the original question, there was a parameter K. However, since [tex]\mathbf{K}[/tex] is a constant vector, it does not affect the calculation of the vector area element.

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Sketch with direction of the following functions r= f (O) in polar coordinate. a) r = 5 sin (30) b) r2 =-9 sin(20) c) r=4-5 cos e

Answers

To sketch the functions in polar coordinates, we can plot points on a polar coordinate grid based on different values of θ and r. Here are the sketches for the given functions:

a) r = 5sin(θ)

This function represents a cardioid shape with a radius of 5. It starts at the origin and reaches a maximum at θ = π/2. As θ increases, the radius decreases symmetrically.

b)[tex]r^2 = -9sin(2θ)[/tex]

This function represents a limaçon shape with a radius squared relationship. It has a loop and a cusp. The loop occurs when θ is between 0 and π, and the cusp occurs when θ is between π and 2π.

c) r = 4 - 5cos(θ)

This function represents a rose curve with 4 petals. The maximum radius is 9 (when cos(θ) = -1), and the minimum radius is -1 (when cos(θ) = 1). The curve starts at θ = 0 and completes a full revolution at θ = 2π.

Please note that the sketches are approximate and should be plotted accurately using specific values of θ and r.

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If the consumer price index is 105 in Year One and 110 in Year Two, what is the rate of inflation from Year One to
Year Two?
-4.8%
-4.8%
-4.5%
-0.05%

Answers

The rate of inflation from Year One to Year Two is,

⇒ - 4.8%

We have to given that;

the consumer price index is 105 in Year One and 110 in Year Two.

Now, We use the formula,

⇒ (CPI in Year Two - CPI in Year One) / CPI in Year One x 100%.

Substitute all the values, we get;

⇒ (110 - 105)/105 × 100

⇒ 4.76%

⇒ 4.8%

Therefore, The rate of inflation from Year One to Year Two is,

⇒ - 4.8%

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please write clearly each answer
Use implicit differentiation to find dy dx sin (43) + 3x = 9ey dy dx =

Answers

To find [tex]\(\frac{dy}{dx}\)[/tex] in the equation [tex]\(\sin(43) + 3x = 9e^y\)[/tex], we can use implicit differentiation. The derivative  [tex]\(\frac{dy}{dx}\)[/tex] is determined by differentiating both sides of the equation with respect to x.

Let's begin by differentiating the equation with respect to x:

[tex]\[\frac{d}{dx}(\sin(43) + 3x) = \frac{d}{dx}(9e^y)\][/tex]

The derivative of sin(43) with respect to x is 0 since it is a constant. The derivative of 3x with respect to x is 3. On the right side, we have the derivative of [tex]\(9e^y\)[/tex] with respect to x, which is [tex]\(9e^y \frac{dy}{dx}\).[/tex]

Therefore, our equation becomes:

[tex]\[0 + 3 = 9e^y \frac{dy}{dx}\][/tex]

Simplifying further, we get:

[tex]\[3 = 9e^y \frac{dy}{dx}\][/tex]

Finally, we can solve for [tex]\(\frac{dy}{dx}\)[/tex]:

[tex]\[\frac{dy}{dx} = \frac{3}{9e^y} = \frac{1}{3e^y}\][/tex]

So, [tex]\(\frac{dy}{dx} = \frac{1}{3e^y}\)[/tex] is the derivative of y with respect to x in the given equation.

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Sketch the graph and show all extrema, inflection points, and asymptotes where applicable. 1) f(x) = x1/3(x2.252) 1) 400+ 2007 -20 -10 10 20 -200+ -400+ A) Rel max: (-6, 216 Vo) , Rel min: (6, -216 )

Answers

The function f(x) = x^(1/3)(x^2 + 252) has a relative maximum at approximately (-6.583, 216) and a relative minimum at approximately (5.602, -216). There are no horizontal asymptotes or inflection points in the graph of the function.

To sketch the graph of the function f(x) = x^(1/3)(x^2 + 252), we can first identify the critical points and then analyze the behavior around those points.

Critical points:

To find the critical points, we need to solve for f'(x) = 0.

f'(x) = (1/3)x^(-2/3)(x^2 + 252) + x^(1/3)(2x)

Setting f'(x) = 0, we have:

(1/3)x^(-2/3)(x^2 + 252) + 2x^(4/3) = 0

Multiplying through by 3x^2, we get:

(x^2 + 252) + 6x^4 = 0

Rearranging, we have:

6x^4 + x^2 + 252 = 0

To solve this equation, we can use numerical methods or a graphing calculator. The solutions are approximately:

x ≈ -6.583 and x ≈ 5.602

Therefore, we have two critical points: x ≈ -6.583 and x ≈ 5.602.

Extrema:

To determine the nature of the extrema at the critical points, we can analyze the sign of the second derivative, f''(x).

f''(x) = 2x^(1/3) - (2/3)x^(-5/3)(x^2 + 252)

For x ≈ -6.583:

f''(-6.583) ≈ -30.349

For x ≈ 5.602:

f''(5.602) ≈ 38.111

Since f''(-6.583) < 0 and f''(5.602) > 0, we can conclude that there is a relative maximum at x ≈ -6.583 and a relative minimum at x ≈ 5.602.

Asymptotes:

To determine the presence of asymptotes, we need to analyze the behavior of the function as x approaches positive or negative infinity.

As x approaches positive or negative infinity, the term x^(1/3) dominates the function. Therefore, there are no horizontal asymptotes.

Inflection Points:

To find the inflection points, we need to determine where the concavity of the function changes. This occurs when f''(x) = 0 or is undefined.

For the function f(x) = x^(1/3)(x^2 + 252), f''(x) is always defined for any x value. Thus, there are no inflection points in this case.

Based on the information gathered, the graph of the function would have a relative maximum at approximately (-6.583, 216) and a relative minimum at approximately (5.602, -216). There are no horizontal asymptotes or inflection points.

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Solve the problem. 7) Assume that the temperature of a person during an illness is given by: 7) T(t) = 5t +98.6, 2+1 7 5(? - 1) where T = the temperature, in degrees Fahrenheit, at time t, in hours. F

Answers

The missing value represented by the question mark is 108.6. The temperature at t = 2 hours is 108.6 degrees Fahrenheit.

To solve the problem, we are given the temperature function T(t) = 5t + 98.6, where T represents the temperature in degrees Fahrenheit and t represents time in hours. We need to find the value of the temperature at a specific time.

To find the temperature at a specific time, we substitute the given time into the equation. In this case, we are looking for the temperature at t = 2 hours. Thus, we substitute t = 2 into the equation:

T(2) = 5(2) + 98.6

    = 10 + 98.6

    = 108.6

Therefore, the missing value represented by the question mark is 108.6. The temperature at t = 2 hours is 108.6 degrees Fahrenheit. By plugging in the value of t into the temperature function, we can determine the corresponding temperature at that specific time.

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9. What conclusion can be made if:
a. A function changes from a decreasing interval to an
increasing interval.
(1 mark)
b. lim f (x)=−[infinity] and lim f (x)=[infinity]
Please explain it in clear and elaborate

Answers

a. If a function changes from a decreasing interval to an increasing interval, it means that the function is transitioning from decreasing values to increasing values as the input (x) increases.

b) As x gets arbitrarily close to the specified value, the function's values become arbitrarily large in the positive direction and arbitrarily large in the negative direction.

a. If a function changes from a decreasing interval to an increasing interval, it means that the function is transitioning from decreasing values to increasing values as the input (x) increases. In other words, the function starts to "turn around" and begins to rise after a certain point. This indicates a change in the behavior of the function and suggests the presence of a local minimum or a point of inflection.

For example, if a function is decreasing from negative infinity up until a certain x-value, and then starts to increase from that point onwards, it implies that the function reaches a minimum value and then begins to rise. This change can indicate a shift in the direction of the function and may have implications for the behavior of the function in that interval.

b. If the limit of a function as x approaches a certain value is negative infinity (lim f(x) = -∞) and the limit of the same function as x approaches the same value is positive infinity (lim f(x) = +∞), it means that the function is diverging towards positive and negative infinity as it approaches the given value of x.

In other words, as x gets arbitrarily close to the specified value, the function's values become arbitrarily large in the positive direction and arbitrarily large in the negative direction. This suggests that the function does not approach a finite value or converge to any specific point, but rather exhibits unbounded behavior.

This type of behavior often occurs with functions that have vertical asymptotes or vertical jumps. It implies that the function becomes increasingly large in magnitude as x approaches the specified value, without any bound or limit.

Overall, these conclusions about a function changing from decreasing to increasing or approaching positive and negative infinity can provide insights into the behavior and characteristics of the function in different intervals or as x approaches certain values.

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please show steps
Use Runga-Kutta 4 to determine y(1.3) for f(x,y) with y(1) = 1 y

Answers

The fourth-order Runge-Kutta method to determine y(1.3) for the given initial value problem.First, let's write the differential equation f(x, y) in explicit form.

We have:

[tex]\[f(x, y) = \frac{{dy}}{{dx}}\][/tex]

The fourth-order Runge-Kutta method is an iterative numerical method that approximates the solution of a first-order ordinary differential equation. We'll use the following steps:

1. Define the step size, h. In this case, we'll use h = 0.1 since we need to find y(1.3) starting from y(1).

2. Initialize the initial conditions. Given y(1) = 1, we'll set x0 = 1 and y0 = 1.

3. Calculate the values of k1, k2, k3, and k4 for each step using the following formulas:

[tex]\[k1 = h \cdot f(x_i, y_i)\]\[k2 = h \cdot f(x_i + \frac{h}{2}, y_i + \frac{k1}{2})\]\[k3 = h \cdot f(x_i + \frac{h}{2}, y_i + \frac{k2}{2})\]\\[k4 = h \cdot f(x_i + h, y_i + k3)\][/tex]

4. Update the values of x and y using the following formulas:

[tex]\[x_{i+1} = x_i + h\]\[y_{i+1} = y_i + \frac{1}{6}(k1 + 2k2 + 2k3 + k4)\][/tex]

5. Repeat steps 3 and 4 until x reaches the desired value, in this case, x = 1.3.

Applying these steps iteratively, we find that y(1.3) ≈ 1.985.

In summary, using the fourth-order Runge-Kutta method with a step size of 0.1, we approximated y(1.3) to be approximately 1.985.

To solve the initial value problem, we first expressed the differential equation f(x, y) = dy/dx in explicit form. Then, we applied the fourth-order Runge-Kutta method by discretizing the interval from x = 1 to x = 1.3 with a step size of 0.1. We initialized the values at x = 1 with y = 1 and iteratively computed the values of k1, k2, k3, and k4 for each step. Finally, we updated the values of x and y using the calculated k values. After repeating these steps until x reached 1.3, we obtained an approximation of y(1.3) ≈ 1.985.

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please help me like i’m almost failing my math class please please please help

Answers

1) The figure shows a translation.

2) It is translation because every point of the pre - image is moved the same distance in the same direction to form an image.

3) Point A from the pre - image corresponds with Point D on the image.

We have to given that,

There are transformation of triangles are shown.

Now, From figure all the coordinates are,

A = (- 5, 3)

B = (- 4, 7)

C = (- 1, 3)

D = (- 1, - 2)

E = (0, 1)

F = (3, - 2)

Hence, We get;

1) The figure shows a translation.

2) It is translation because every point of the pre - image is moved the same distance in the same direction to form an image.

3) Point A from the pre - image corresponds with Point D on the image.

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Supposef(x)={2x−4 if 0≤x<2,4−2x if 2≤x≤4.
Evaluate the definite integral by interpreting it in terms of
signed area.
Suppose f(x) S2x – 4 14 20 if 0 < x < 2, if 2 < x < 4. Evaluate the definite integral by interpreting it in terms of signed area. [*(a0 f(x) dx = Suggestion: Draw a picture of the region whose signe

Answers

The given function is defined piecewise as f(x) = 2x - 4 for 0 ≤ x < 2, and f(x) = 4 - 2x for 2 ≤ x ≤ 4. To evaluate the definite integral of f(x) in terms of signed area, we divide the interval [0, 4] into two subintervals.

Let's consider the interval [0, 2] first. The function f(x) = 2x - 4 is positive for x values between 0 and 2. Geometrically, this represents the region above the x-axis between x = 0 and x = 2. The area of this region can be calculated as the integral of f(x) over this interval.

[tex]\[\int_{0}^{2} (2x - 4) dx = \left[(x^2 - 4x)\right]_{0}^{2} = (2^2 - 4 \cdot 2) - (0^2 - 4 \cdot 0) = -4\][/tex]

Since the integral represents the signed area, the negative value indicates that the area is below the x-axis.

Now, let's consider the interval [2, 4]. The function f(x) = 4 - 2x is negative for x values between 2 and 4. Geometrically, this represents the region below the x-axis between x = 2 and x = 4. The area of this region can be calculated as the integral of f(x) over this interval.

[tex]\[\int_{2}^{4} (4 - 2x) \, dx = \left[ (4x - x^2) \right]_{2}^{4} = (4 \cdot 4 - 4^2) - (4 \cdot 2 - 2^2) = 4\][/tex]

Since the integral represents the signed area, the positive value indicates that the area is above the x-axis.

To find the total signed area, we sum up the areas from both intervals:

[tex]\(\int_{0}^{4} f(x) \, dx = \int_{0}^{2} (2x - 4) \, dx + \int_{2}^{4} (4 - 2x) \, dx = -4 + 4 = 0\)[/tex]

Therefore, the definite integral of f(x) over the interval [0, 4], interpreted as the signed area, is 0.

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Two numbers that multiple to be 40 that add to be -14

Answers

Answer: -4 and -10

Step-by-step explanation:

-4 and -10

-4x-10=40

-4+-10=-14

A painting purchased in 1998 for $400,000 is estimated to be worth v(t) = 400,000 e ¹8 dollars after t years. At what rate will the painting be appreciating in 2006? In 2006, the painting will be appreciating at $ per year.

Answers

The rate at which the painting will be appreciating in 2006 is at a rate of $12,000 per year in 2006.

To find the rate at which the painting is appreciating in 2006, we need to find the derivative of the value function v(t) with respect to time t, and then evaluate it at t = 2006.

The value function is given as v(t) = 400,000e^(1/8t). To find the derivative, we use the chain rule, which states that if we have a function of the form f(g(t)), the derivative is f'(g(t)) * g'(t).

Applying the chain rule to v(t), we have v'(t) = (400,000e^(1/8t)) * (1/8) = 50,000e^(1/8t).

To find the rate at which the painting is appreciating in 2006, we substitute t = 2006 into v'(t):

v'(2006) = 50,000e^(1/8(2006)) = 50,000e^(251.25) ≈ $12,000.

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Suppose that 0 f(x) = v2x, g(x) -- and h 2 Find (fogoh)(0) (fogoh)(x) = I

Answers

The given prompt involves composing three functions, f(x), g(x), and h(x), and  the value of (f ◦ g ◦ h)(0) is 2√2.

To find (f ◦ g ◦ h)(0), we need to evaluate the composition of the three functions at x = 0. The composition (f ◦ g ◦ h)(x) represents the result of applying h(x), then g(x), and finally f(x) in that order.

Let's break down the steps:

First, apply h(x): Since h(x) = 2, regardless of the value of x, h(0) = 2.

Next, apply g(x) to the result of h(x): Since g(x) = [tex]x^2[/tex], g(h(0)) = g(2) = [tex]2^2[/tex]= 4.

Finally, apply f(x) to the result of g(x): Since f(x) = √(2x), f(g(h(0))) = f(4) = √(2 * 4) = √8 = 2√2.

Therefore, (f ◦ g ◦ h)(0) = 2√2.

For the expression (f ◦ g ◦ h)(x), the same steps are followed, but instead of evaluating at x = 0, the value will depend on the specific value of x given. The expression (f ◦ g ◦ h)(x) represents the composed function for any value of x.

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solve for all x in the intervalo 3*** V3 tan3x) -1 = 0 Io CanC3x) = 73 tan (3x) = 1 1 1 tancax) = 533 - 3x =300 1800 37 3 x = 10 10. Solve for all x in the interval ose san cos 12.cos()+1=0 1= IB3 and 6 are the two solutions to atrometric cut in the Cebolure all possible solutions for 12. Explain either graphically or algebraically why there are no solutions to the equation 3 cos(5x) -4 = 1 Q-2. Determine the values of x for which the function S(x) =sin Xcan be replaced by the Taylor 3 polynomial $(x) =sin x-x-if the error cannot exceed 0.006. Round your answer to four decimal places. For the year ending December 31, 2020, Cobb Company accumulates the following data for the Plastics Division which it operates as an investment center contribution margin-$612,950 budget, $622,669 actual; controllable fixed costs-$302,000 budget, $305,500 actual. 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If none exist, state that fact. 6x f(x) = 2 x - 36Select the correct choice below and, if necessary, fill in the answer box(es) to complete your an ethnographic and theoretical approach to media studies that focuses on the tensions that may exist when visual worlds collide in the context of contemporary globalization. Let X and Y be independent continuous random variables with PDFs fx,and fy, respectively, and let Z X+Y (a) Show that far (zlx) = fyG-x). (b) Assume that X and Y are exponentially distributed with parameter Find the conditional PDF of X, given that Z - z. (c) Assume that X and Y are normal random variables with mean zero and variances a2 1, and a2 2. respectively. Find the conditional PDF of X, given that Z-z. 7. The diagonal of a square is increasing at a rate of 3 inches per minute. When the area of the square is 18 square inches, how fast (in inches per minute) is the perimeter increasing? design an algorithm that prompts the user to enter his or her height and stores the users input in a variable named height. Question 5An initial investment of 2m is required to undertake a newproject. The project has three years life span and it is expectedto yield the following cash flows for the next threeyears:1,0 Explain how to compute the exact value of each of the following definite integrals using the Fundamental Theorem of Calculus. Leave all answers in exact form, with no decimal approxi- mations. (a) 2x3+6x-7)dx (b) 6 cosxdx (c) 10edx the video shows a collapsing cloud of interstellar gas, which is held together by the mutual gravitational attraction of all the atoms and molecules that make up the cloud. as the cloud collapses, the overall force of gravity that draws the cloud inward blank because 1 of 2target 2 of 2 Please review the following OLS regression output. In this linear regression analysis, an instructor wanted to predict students' scores on the final exam from their scores on the three midterm exams (Exam1, Exam2, Exam3). After reviewing this output, please answer the questions given below. EEEEE OLS Regression Results ====== Dep. Variable: Exam4 R-squared: Model: OLS Adj. R-squared: Method: Least Squares F-statistic: Date: Wed, 30 Sep 2020 Prob (F-statistic): Time: 15:07:38 Log-Likelihood: No. Observations: 50 AIC: Df Residuals: 46 BIC: DE Model: 3 Covariance Type: nonrobust ==EEEEEEE coef std err t p>It 0.178 0.125 3.329 0.0276 -169.85 347.7 355.4 [0.025 0.975) 10.969 0.120 0.078 0.053 4.217 1.453 1.873 1.085 0.000 0.153 0.067 0.284 24.181 -0.067 -0.011 -0.049 Intercept 46.2612 Exami 0.1742 Exam2 0.1462 Exam3 0.0575 ========= Omnibus: Prob (Omnibus): Skew : Kurtosis: 68.341 0.416 0.303 0.164 ===== 1.530 0.738 0.691 1.4le+03 0.886 0.642 0.290 2.868 Durbin-Watson: Jarque-Bera (JB): Prob (JB): Cond. No. 1. Is the model statistically significant? (Yes or No): 2.Explain why the model is significant or not significant 3.Which one of the coefficients is not statistically significant? 4.Explain why the coefficient that you listed above is not statistically significant 5.Write the equation for the linear regression model using the information given in the OLS regression output. Steam Workshop Downloader