50 Points! Multiple choice geometry question. Photo attached. Thank you!

As the degrees of freedom increase, the Chi-square distribution becomes less skewed.

Option C is the correct answer.

We have,

The Chi-square distribution is a probability distribution that is commonly used in statistics.

It is often used in hypothesis testing and in constructing confidence intervals for population variances.

The shape of the Chi-square distribution depends on the degrees of freedom (df). The degrees of freedom represent the number of independent pieces of information used to estimate a parameter or make an inference.

When the degrees of freedom are small, such as 1 or 2, the Chi-square distribution is highly skewed to the right.

This means that the distribution has a long tail on the right side and is concentrated toward the lower values.

However, as the degrees of freedom increase, the Chi-square distribution becomes less skewed.

The distribution becomes more symmetrical and approaches a bell shape, similar to the shape of a normal distribution. This means that the values are more evenly spread out and there is less concentration towards the lower values.

Therefore,

As the degrees of freedom increase, the Chi-square distribution becomes less skewed.

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Answer:

Is 03.841

Step-by-step explanation:

To find the critical value needed to test the claim that the sentence is independent of the plea, we need to perform a chi-square test of independence. The critical value is based on the significance level (α) and the degrees of freedom.

In this case, the given significance level is 0.05. Since the table represents a 2x2 contingency table (two categories for plea and two categories for sentence), the degrees of freedom (df) can be calculated as (number of rows - 1) * (number of columns - 1) = (2 - 1) * (2 - 1) = 1.

To find the critical value at a significance level of 0.05 with 1 degree of freedom, we consult a chi-square distribution table or use statistical software.

The critical value for a chi-square test with 1 degree of freedom and a significance level of 0.05 is approximately 3.841.

Therefore, the correct answer is 03.841.

Answer:

The passenger train is traveling at 45 mph, and the freight train is traveling at 27 mph.

Step-by-step explanation:

Let's assume the speed of the passenger train is represented by x mph.

According to the given information, the freight train leaves the depot 2 hours before the passenger train. Therefore, when the passenger train starts, the freight train has already been traveling for 2 hours.

Let's represent the speed of the freight train as (x - 18) mph, which is 18 mph slower than the passenger train.

Now, we know that the passenger train overtakes the freight train in 3 hours. This means that the passenger train traveled for 3 hours, while the freight train traveled for 3 + 2 = 5 hours.

Since speed = distance/time, we can set up the following equation based on the distances covered by each train:

Distance covered by passenger train = Distance covered by freight train

Using the formula, distance = speed × time, we get:

x × 3 = (x - 18) × 5

Simplifying the equation:

3x = 5x - 90

90 = 5x - 3x

90 = 2x

Dividing both sides by 2:

45 = x

So, the speed of the passenger train is 45 mph.

The speed of the freight train is 45 - 18 = 27 mph.

To show that the conditional statement [(p → q) ∧ (q → r)] → (p → r) is a tautology without using truth tables, we can use a logical proof known as the Law of Implication.

To show that the conditional statement [(p → q) ∧ (q → r)] → (p → r) is a tautology without using truth tables, we can employ a logical proof known as a direct proof.

First, let's assume that the antecedent, [(p → q) ∧ (q → r)], is true.

This means that both (p → q) and (q → r) are true simultaneously.

Using the definition of implication, (p → q) can be written as (~p ∨ q) and (q → r) can be written as (~q ∨ r).

So we have (~p ∨ q) ∧ (~q ∨ r) as the conjunction of the two implications.

Now, we need to prove that (p → r) is also true.

Using the definition of implication, (p → r) can be written as (~p ∨ r).

To show that (p → r) is true, we need to prove that ~p ∨ r is true.

We can do this by considering the two cases:

If ~p is true, then ~p ∨ r is true regardless of the truth value of r.

If ~p is false, then p is true, and since (p → q) and (q → r) are both true, q and r must also be true.

Thus, ~p ∨ r is true.

In both cases, ~p ∨ r is true, which means (p → r) is true.

Since both the antecedent [(p → q) ∧ (q → r)] and the consequent (p → r) are true, we can conclude that the conditional statement [(p → q) ∧ (q → r)] → (p → r) is a tautology.

Therefore, using a direct proof, we have shown that the given conditional statement is always true and satisfies the definition of a tautology.

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Answer:

45/49

Step-by-step explanation:

The first step to dividing fractions is to find the reciprocal (reverse the numerator and denominator) of the second fraction. Next, multiply the two numerators. Then, multiply the two denominators. Finally, simplify the fractions if needed.

9/14 * 10/7 = 90/98

divide the numerator and the denominator by 2.

90 * 2 = 45

98 * 2 = 49

45/49

The amount of fabric required is 400.551 ft².

We have,

CB= 8 feet

CF= 13 feet

AM = 8 feet

Using Pythagoras

AC² = AM² + CM²

AC = √64+16 = √80 = 4√5 feet

Now, the formula for Triangular prism is

= (Sum of three sides of triangle face)l + base area

= (4√5 + 4√5 + 8)13 + 8 x 8

= 104√5 + 104 + 64

= 104√5 + 168

= 232.551 + 168

= 400.551 ft²

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50% probability that a student chosen randomly from the class does not play a sport.

Using the probability concept, it is found that there is a 0.5 = 50% probability that a student chosen randomly from the class does not play a sport.

A probability is the number of desired outcomes divided by the number of total outcomes.

In this problem:

In total, there are 8 + 7 + 3 + 12 = 30 students.

Of this total, 3 + 12 = 15 do not play a sport.

Thus, probability = 15/30

= 1/2

= 0.5

Therefore, 50% probability that a student chosen randomly from the class does not play a sport.

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The perimeter of shaded figure is 10 unit.

We know,

The perimeter of a figure is the total distance around its boundary. To calculate the perimeter, you need to sum the lengths of all the sides of the figure.

From the figure

length of rectangle = 4 unit

width of rectangle =  1 unit

Now, the perimeter of shaded figure

= 2 (l + w)

= 2 (4 +1 )

= 2 x 5

= 10 unit

Thus, the perimeter of figure is 10 unit.

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The derivative of function f(w) = [tex]2/(w^2 - 4)^5 ~is ~f'(w) = -40~w~(w^2 - 4)^{-6}.[/tex]

We have,

To find the derivative of the function [tex]f(w) = 2/(w^2 - 4)^5[/tex], we can use the chain rule and the power rule for differentiation.

Let's go through the steps:

First, rewrite the function as [tex]f(w) = 2(w^2 - 4)^{-5}.[/tex]

Now, let's differentiate f(w) with respect to w:

[tex]f'(w) = d/dw~ [2(w^2 - 4)^{-5}][/tex]

To apply the chain rule, we need to differentiate the outer function and multiply it by the derivative of the inner function.

Using the power rule, the derivative of (w² - 4) with respect to w is 2w.

Applying the chain rule:

[tex]f'(w) = -10 \times 2(w^2 - 4)^{-6} \times 2w[/tex]

Simplifying further:

[tex]f'(w) = -40w(w^2 - 4)^{-6}[/tex]

Therefore,

The derivative of function f(w) = [tex]2/(w^2 - 4)^5 ~is ~f'(w) = -40~w~(w^2 - 4)^{-6}.[/tex]

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The function h(x) = |x - 2| + 5 is increasing for x values greater than 2. Mathematically, we can express this interval as (2, ∞).

So, the correct option is A. (2, ∞)

To determine on which interval the function h(x) = |x - 2| + 5 is increasing, we need to examine the behavior of the function as x increases.

First, let's analyze the absolute value function |x - 2|. The absolute value of a number is always non-negative, so |x - 2| is greater than or equal to zero for all values of x. Therefore, it does not affect the overall increasing or decreasing behavior of the function h(x).

Now, let's consider the term |x - 2| + 5. As x increases, the value of |x - 2| remains constant (as long as x is greater than or equal to 2), but the value of the entire expression |x - 2| + 5 increases. This is because we are adding a positive constant (5) to |x - 2|.

Therefore, the function h(x) = |x - 2| + 5 is increasing for x values greater than 2. Mathematically, we can express this interval as (2, ∞).

So, the correct option is A. (2, ∞)

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The number of missed shots after 10 weeks of practice is 1

From the question, we have the following parameters that can be used in our computation:

The line of best fit

Also, we have the equation to be

y  = -1/2x + 6

At the 10th weeks, we have

x = 10

Substitute the known values in the above equation, so, we have the following representation

y  = -1/2 * 10 + 6

Evaluate

y = 1

Hence, the number of missed shots after 10 weeks of practice is 1

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The remaining credit after 65 minutes of calls is approximately $15.45.

To find the remaining credit after 65 minutes of calls, we can use the given information to determine the linear function that relates the remaining credit to the total calling time.

Let's assume the total calling time in minutes is represented by the variable "x," and the remaining credit in dollars is represented by the variable "y."

We are given two data points:

When x = 43, y = $19.41.

When x = 56, y = $17.72.

We can use these data points to form a system of linear equations.

Let's solve it to find the equation of the linear function.

Using the point-slope form of a linear equation:

y - y1 = m(x - x1), where (x1, y1) is a point on the line and m is the slope, we can substitute the values:

For the first data point:

x1 = 43

y1 = 19.41

Using the second data point:

x2 = 56

y2 = 17.72

The slope (m) can be calculated as:

m = (y2 - y1) / (x2 - x1)

m = (17.72 - 19.41) / (56 - 43)

m = -1.69 / 13

m ≈ -0.13

Now, we can use the point-slope form with one of the data points to find the equation of the linear function:

Using (x1, y1) = (43, 19.41):

y - 19.41 = -0.13(x - 43)

Simplifying the equation:

y - 19.41 = -0.13x + 5.59

y = -0.13x + 24

Now that we have the equation of the linear function, we can substitute x = 65 to find the remaining credit after 65 minutes:

y = -0.13(65) + 24

y ≈ $15.45

Therefore, the remaining credit after 65 minutes of calls is approximately $15.45.

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The type of sytudy that we have here is the observational study.

In an observational study, the researcher observes and analyzes data from individuals without actively intervening or manipulating any variables.

In this case, the researcher is observing and comparing the health outcomes of two groups of individuals: those who have eaten a vegan diet for the past five years and those who have not.

The participants are not randomly assigned to the groups, and the researcher does not actively control or manipulate the diet of the individuals.

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Answer:

x = 10.5

y =5.25

Step-by-step explanation:

sin60° = 21√3/x

√3/2 = 21√3/x

=> x = 21√3/√3/2 = 10.5

cos60° = y/x

1/2 = y/10.5

y = 10.5/2 = 5.25

The relationship between angles 8 and 7 is that they are supplementary. option B is correct.

Given that a quadrilateral, with three parallel lines, we need to find the relation between angles 8 and 7,

We know that the adjacent angles between the parallel lines are supplementary,

We know that,

Supplementary angles are a pair of angles that add up to 180 degrees. In other words, if you have two angles that are supplementary, the sum of their measures will always be 180 degrees.

So,

The relation between the angles is that they are Supplementary angles.

Hence the option B is correct.

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The value of AB is,

⇒ AB = 5.9

(rounded to nearest tenth)

We have to given that,

A right triangle ABC is shown.

Now, By trigonometry formula,

we get;

⇒ cos 33° = Base / Hypotenuse

Substitute all the values, we get;

⇒ cos 33° = AB / 7

⇒ 0.84 = AB / 7

⇒ AB = 0.84 × 7

⇒ AB = 5.88

⇒ AB = 5.9

(rounded to nearest tenth)

Thus, We get;

AB = 5.9

(rounded to nearest tenth)

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a = 30°

b = 180-135 = 45°

total angle inside triangle = 180°

x = 180-(30+45) = 105°

Applying the angle of intersecting secants theorem, the measure of arc LN in the circle is: 56°.

Given the circle in the image above where the two secants intersect outside the circle, the angle of intersecting secants theorem states that:

external angle formed = 1/2 * (the measure of arc KP - the measure of arc LN)

Plug in the values:

20 = 1/2 * (96 - m(LN))

2 * 20 = 96 - m(LN)

40 = 96 - m(LN)

m(LN) = 96 - 40

m(LN) = 56°

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When dividing the polynomial[tex]P(x) = 2x^3 + 5x^2 - 3x + 4[/tex] by the binomial (x - 2), the quotient is [tex]5x^2 + 10x + 20.[/tex]

To find the quotient when dividing the polynomial [tex]P(x) = 2x^3 + 5x^2 - 3x + 4[/tex] by the binomial (x - 2), we can use synthetic division. Synthetic division is a method used to divide polynomials quickly and efficiently.

First, we set up the synthetic division table by writing the coefficients of the polynomial in descending order:

    2  |   5   -3   4

        |___________

Next, we bring down the first coefficient, which is 5:

    2  |   5   -3   4

        |___________

        |   5

To calculate the next row, we multiply the divisor (2) by the value in the previous row (5) and write the result below the next coefficient:

    2  |   5   -3   4

        |___________

        |   5

        |___________

             10

We add the values in the second and third rows:

    2  |   5   -3   4

        |___________

        |   5

        |___________

            10    7

We repeat this process until we reach the last coefficient:

    2  |   5   -3   4

        |___________

        |   5

        |___________

             10    7

             20  34

The quotient is given by the numbers in the bottom row: [tex]5x^2 + 10x + 20.[/tex]

Therefore, when dividing the polynomial[tex]P(x) = 2x^3 + 5x^2 - 3x + 4[/tex] by the binomial (x - 2), the quotient is [tex]5x^2 + 10x + 20.[/tex]

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The complete question may be like:

Using synthetic division, what is the quotient when dividing the polynomial [tex]P(x) = 2x^3 + 5x^2 - 3x + 4[/tex] by the binomial (x - 2)? human generated answer without plagiarism. 200 words.

The The equation that would represent Maria's possible sales, S(c, b), is:

S(c, b) = 1.50c + 1.20b

The term 1.50c represents the total revenue from selling bags of chips.

The term 1.20b represents the total revenue from selling candy bars.

So, the equation can be written as

S(c, b) = 1.50c + 1.20b

This equation represents the total sales amount (S) based on the quantities of bags of chips (c) and candy bars (b) sold.

The equation calculates the sales by multiplying the number of bags of chips (c) by their price of $1.50 each and the number of candy bars (b) by their price of $1.20 each.

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The surface area of this composite solid is 265.36 units².

In Mathematics and Geometry, the surface area of a rectangular prism can be calculated and determined by using this mathematical equation or formula:

Surface area of a rectangular prism = 2(LH + LW + WH)

Where:

By substituting the given side lengths into the formula for the surface area of a rectangular prism, we have the following;

Surface area of rectangular prism = 2[3 × 5 + (3× 10) + (5 × 10)]

Surface area of rectangular prism = 2[15 + 30 + 50]

Surface area of rectangular prism = 190 units².

Surface area (SA) of a cylinder = 2πrh + 2πr²

Surface area (SA) of a cylinder = 2 × 3.14 × 2 × 4 + 2 × 3.14 × 2²

Surface area (SA) of a cylinder = 50.24 + 25.12

Surface area (SA) of a cylinder = 75.36 units².

Therefore, we have:

Surface area of composite solid = 190 units² + 75.36 units².

Surface area of composite solid = 265.36 units²

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The line of reflection that would make A'B'C'D' the image of ABCD is line 3

From the question, we have the following parameters that can be used in our computation:

Rectangles ABCD and A'B'C'D'

Also, we can see that

Both rectangles are in opposite quadrants

This means that the line of reflection must be slant line in the adjacent quadrants

In this case, the line is line 3

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5. The minimum value of g(x) is -8.

The maximum value of g(x) is 17.

6. The average rate of change of the function g(x) over the interval [-2, 3] is 5.

By critically observing the table representing the function g(x), we can logically deduce the following minimum value and maximum value over the interval [-2, 3];

When x = -2, the minimum value of g(x) is equal to -8.

When x = 0, the maximum value of g(x) is equal to 17.

Question 6.

In Mathematics, the average rate of change of f(x) on a closed interval [a, b] is given by this mathematical expression:

Average rate of change = [f(b) - f(a)]/(b - a)

Next, we would determine the average rate of change of the function g(x) over the interval [-2, 3]:

a = -2; f(a) = -8

b = 3; f(b) = 17

Average rate of change = (17 + 8)/(3 + 2)

Average rate of change = 25/5

Average rate of change = 5

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Part A: equate the expressions 6x - 8 = 3x - 5

collect the like terms 6x -3x = -5 + 8

Divide by the coefficient x = 1

Part B: The values are (1, -3)

To determine the value of the variables,  we need to consider the equations.

From the information given, we have the equations given as;

y = 3x − 5

y = 6x − 8

Now, equate the expressions, we get;

6x - 8 = 3x - 5

collect the like terms, we have;

6x - 3x = -5 + 8

add or subtract the like terms

3x = 3

Divide by the coefficient

x = 1

Substitute the value

y= 6(1) - 9

expand the bracket

y = 6 - 9 = -3

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The slope of the line that is perpendicular to the line y = 3x - 8 is -1/3.

The given line has an equation in slope-intercept form, which is y = 3x - 8. In this form, the coefficient of x represents the slope of the line.

Therefore, the slope of the given line is 3.

To find the slope of a line perpendicular to the given line, we need to take the negative reciprocal of the slope.

The negative reciprocal of 3 is -1/3.

Therefore, the slope of the line that is perpendicular to the line y = 3x - 8 is -1/3.

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To calculate the amount of money needed to deposit into the account today, we can use the concept of present value. The present value represents the current value of future cash flows, taking into account the time value of money.

1. To calculate the present value of the cash flows, we can use the formula for the present value of an annuity:

PV = C * (1 - (1 + r)^(-n)) / r

Where PV is the present value, C is the cash flow per period, r is the interest rate per period, and n is the number of periods.

In this case, the cash flow per period is $100, the interest rate per period is 6% (0.06), and the number of periods is 20.

Plugging in the values into the formula:

PV = 100 * (1 - (1 + 0.06)^(-20)) / 0.06

Calculating this value gives us the amount of money needed to deposit into the account today.

2. To show explicitly using an Excel spreadsheet, you can set up a column for each year, starting from year 0 (the present year) to year 20. In the first row, enter the initial deposit amount calculated in step 1. In the subsequent rows, use a formula to calculate the value for each year by adding the interest earned and subtracting the annual withdrawal of $100. The last value in year 20 should be zero, indicating that the account will have no remaining balance after the last withdrawal.

3. If the bank's annual interest rate changes to 10%, you would need to recalculate the present value using the new interest rate. Repeat step 1 with the new interest rate of 10% (0.10) to find the updated amount of money needed to deposit into the account today. Compare this value with the previous amount calculated with a 6% interest rate to determine the difference.

The diameter of the hemisphere is 39.1918 feet.

The surface area of a hemisphere is given by the formula:

Surface Area = 2πr²

We have,

surface area of the hemisphere is 768π square feet,

So, 2πr² = 768π

Dividing both sides of the equation by 2π, we get:

r² = 384

To find the diameter, we need to double the radius.

Taking the square root of both sides of the equation, we get:

r = √384

r ≈ 19.5959

Now, Diameter ≈ 2 x 19.5959 ≈ 39.1918

Therefore, the diameter of the hemisphere is 39.1918 feet.

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The dimensions of the smaller prism are each multiplied by the factor of 1/3 for length, 1/4 for width, and 1/4 for height to produce the corresponding dimensions of the larger prism.

To determine the factor by which the dimensions of the smaller prism are multiplied to produce the corresponding dimensions of the larger prism, let's consider the relationship between the two prisms.

A prism is a three-dimensional shape with two parallel, congruent bases connected by rectangular faces. Since the problem specifies that the dimensions of the smaller prism are being multiplied to obtain the dimensions of the larger prism, we can infer that the prisms are similar, meaning they have the same shape but possibly different sizes.

Let's denote the dimensions of the smaller prism as length, width, and height, and the corresponding dimensions of the larger prism as L, W, and H.

To find the factor by which the dimensions are multiplied, we need to compare the corresponding sides of the two prisms. Based on the information provided, we can establish the following relationships:

L = 3 × length

W = 4 × width

H = 4 × height

We can rewrite these relationships as:

length = L/3

width = W/4

height = H/4

Now, let's compare the ratios of corresponding sides:

length/L = (L/3)/L = 1/3

width/W = (W/4)/W = 1/4

height/H = (H/4)/H = 1/4

From these ratios, we can observe that each dimension of the smaller prism is one-third (1/3) the size of the corresponding dimension of the larger prism in terms of length, one-fourth (1/4) in terms of width, and one-fourth (1/4) in terms of height.

Therefore, the dimensions of the smaller prism are each multiplied by the factor of 1/3 for length, 1/4 for width, and 1/4 for height to produce the corresponding dimensions of the larger prism.

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