IM GIVING 40 POINTS!
There is a stack of 10 cards, each given a different number from 1 to 10. Suppose we select a card randomly from the stack, replace it, and then randomly select another card. What is the probability that the first card is an odd number and the second card is less than 4? Write your answer as a fraction in the simplest form

Answer:

B

Step-by-step explanation:

Sara read for a constant rate for 6 days and got a total of 7 1/2 hours.

Therefore, the situation can be represented by the equation 1 1/4×6=7 1/2

Answer:

The answer to your problem is, 2.04 inches

Step-by-step explanation:

We can assume that the width of the new phone is ‘ x ‘ inches

We know that [tex]\frac{x}{0.84} = \frac{3.4}{1.4}[/tex]

x = [tex]\frac{3.4}{1.4}[/tex] × 0.84

x = 2.04

Thus the answer to your problem is, 2.04 inches

1. The truncation error is 0.66346 (approx)

2. the coefficient of [tex](x - 1)^2[/tex] in the expansion is 1, and the coefficient of [tex](x - 1)^4[/tex] is -1/3!.

3. [tex]H(z) = (1 - 28z^{-1} + z^{-2})/(1 - z^{-1})[/tex]

4. [tex]x(n) = [-1/(n - 5)^3 + 0.375*2^{(n-1)}]u(n-1)[/tex]

What is truncation error?

Truncation error refers to the difference between an exact or ideal mathematical result and an approximation of that result obtained through a numerical method, algorithm, or series expansion, where the approximation is truncated or rounded off at a certain point due to computational limitations.

The Maclaurin series expansion of cot(x) is given by:

[tex]cot(x) = 1/x - (x/3) - (2x^3)/45 - (2x^5)/945 + ...[/tex]

The first four terms are:

cot(x) ≈ 1/x - (x/3)

If x = 0.5, then the exact value of cot(x) is:

cot(0.5) = 1/tan(0.5) = 1/0.546302 = 1.830127

The truncation error is the difference between the exact value and the approximation:

error = cot(0.5) - (1/0.5 - (0.5/3)) = 1.830127 - 1.166667 = 0.66346 (approx)

2. We can expand xsinx - 1 in powers of x - 1 using the Maclaurin series for sin(x):

[tex]sin(x) = x - (x^3)/3! + (x^5)/5! - ...[/tex]

Multiplying by x and subtracting 1 gives:

[tex]x*sin(x) - 1 = x^2 - (x^4)/3! + (x^6)/5! - ...[/tex]

Now, replacing x with (x - 1) gives:

[tex](x - 1)*sin(x - 1) - 1 = (x - 1)^2 - ((x - 1)^4)/3! + ((x - 1)^6)/5! - ...[/tex]

So, the coefficient of [tex](x - 1)^2[/tex] in the expansion is 1, and the coefficient of [tex](x - 1)^4[/tex] is -1/3!.

3. The z-transform of h(n) is given by:

H(z) = Z{h(n)} = Z{S(n)} - 28Z{(n − 1)} + Z{S(n - 2)}

Using the z-transform properties of linearity, time shifting, and the z-transform of the unit step function, we get:

[tex]H(z) = 1/(1 - z^{-1}) - 28z^-{1}/(1 - z^{-1}) + z^{-2}/(1 - z^{-1})[/tex]

Simplifying the expression, we get:

[tex]H(z) = (1 - 28z^{-1} + z^{-2})/(1 - z^{-1})[/tex]

4. To find the sequence x(n) from the given Z-transform, we use partial fraction decomposition:

[tex]-1/(z - 5)^3 + 0.375/(1 - 0.5z)^2[/tex]

Using the z-transform property of the delayed unit step function, we get:

[tex]x(n) = [-1/(n - 5)^3 + 0.375*2^{(n-1)}]u(n-1)[/tex]

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The required function is - cos (80°)

In mathematics, reference angles are also known as acute angles. It falls in an interval of fewer than 90 degrees. The reference angles are used to evaluate the larger angles. Even to find the larger angles, we use reference angles that are less than 90 degrees.

The data is :

The trigonometric function is cos(260°)

Here, the angle will lie in the third quadrant, so use the reference angle to evaluate the function as follows,

Cos(270° - 10°) = - sin(10°)   [Here, use the identity [tex]sin(\frac{3\pi}{2}-\theta )=-cos(\theta)[/tex]]

                        = -sin(90° - 80°)  [Use the identity [tex]cos(\frac{\pi}{2} -\theta)=sin(\theta)[/tex]]

                       = - cos (80°)

Thus, the required function is - cos (80°).

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The average rate at which the object falls during the first 3 seconds is given as follows:

-48.

The average rate of change of a function is given by the change in the output of the function divided by the change in the input of the function.

The function for this problem is defined as follows:

h(x) = 400 - 16x².

The numeric values are given as follows:

Thus the average rate of change is obtained as follows:

r = (256 - 400)/(3 - 0)

r = -48.

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The probability that the standard normal random variable z is less than -0.87 is approximately 0.1922.

To find the probability P(Z < -0.87) for a standard normal random variable or z-score, follow these steps:

1. Identify the given value: In this case, z = -0.87.

2. Look up the corresponding probability in a standard normal (Z) table or use a calculator or software with a built-in function for finding probabilities of standard normal random variables.

Using a standard normal table or software, you'll find that P(Z < -0.87) ≈ 0.1922. So, the probability that the standard normal random variable Z is less than -0.87 is approximately 0.1922.

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Answer:

There are three ways to roll a sum of 4: (1,3), (2,2), and (3,1). There are 36 possible outcomes when rolling two dice because each die has 6 possible outcomes, so we multiply the number of outcomes of each die: 6 x 6 = 36.

Therefore, the probability of rolling a sum of 4 with two standard dice is:

P(D1 + D2 = 4) = number of ways to roll a sum of 4 / total number of outcomes

P(D1 + D2 = 4) = 3 / 36

Simplifying the fraction, we get:

P(D1 + D2 = 4) = 1 / 12

Therefore, the probability of rolling a sum of 4 with two standard dice is 1/12 or approximately 0.083.

Step-by-step explanation:

in answer

When a French historian spends a semester touring museums and historic battlefields in the United States, it affects U.S. exports, imports, and net exports as follows:

- U.S. Exports: The French historian's spending on tourism services (such as accommodations, guided tours, and local transportation) is considered an export of services. As the historian spends money in the U.S., it will lead to an increase in U.S. exports.
- U.S. Imports: There is no direct impact on U.S. imports, as the historian's activities do not involve the U.S. purchasing goods or services from France or any other country.
- Net Exports: Since the French historian's spending increases U.S. exports without affecting imports, this will result in an increase in U.S. net exports (which is the difference between exports and imports).

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The  sum of the vectors u and v is (-1,1).

To find the sum of the vectors u and v, we need to add their corresponding components.

The vector u has initial point (2,0) and terminal point (3,2), which means its components are (3-2, 2-0) = (1,2).

The vector v has initial point (2,2) and terminal point (0,1), which means its components are (0-2, 1-2) = (-2,-1).

To find the sum of these vectors, we simply add their corresponding components:

u + v = (1,2) + (-2,-1) = (1-2, 2-1) = (-1,1).

Therefore, the sum of the vectors u and v is (-1,1).

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Answer: I think its 2x + c

Hope it helped :D

Let me know if I helped

Sorry if wrong

The general solution of the O.D.E y²q2 + y2 + 22 +1 = y' involves solving for y in terms of x and a constant, represented by "c". To do this, we can use the technique of separation of variables.

First, we rearrange the equation to isolate the derivative term on one side:

y²q2 + y² + 22 + 1 = y'
y²q2 + y² + 1 = y' - 2
(y²q2 + y² + 1)dy = dx

Next, we integrate both sides with respect to their respective variables:

∫(y²q2 + y² + 1)dy = ∫dx
y³/3 + y + y = x + c
y³ + 3y = 3x + c

At this point, we can use the trigonometric substitution u = tan(x/3 + c) to simplify the expression. Then, we can solve for y in terms of u:

u = tan(x/3 + c)
y = √(u² - 1/3)

Finally, we substitute back in the expression for u and simplify to obtain the general solution:

y = √(tan²(x/3 + c) - 1/3)
y = tan(x/3 + c)

Therefore, the answer is (a) y = tan(x/3 + c).

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The amount of time this company would continue to manufacture this computer is equal to 14 months.

In order to calculate the amount of time this company continue to manufacture this computer, we would have to determine an equation for S(t) by integrating the function S'(t) with respect to t as follows;

[tex]S'(t)= -10t^{\frac{2}{3} } \\\\S(t)= \int S'(t) \, dt\\\\S(t)= \frac{-10}{\frac{2}{3} +1}t^{\frac{2}{3}+1} +C\\\\S(t)= -6t^{\frac{5}{3}} +C\\\\S(t)= -6t^{\frac{5}{3}} +1480[/tex]

Note: The y-intercept or initial value is 1,480 (t = 0).

At 1,000 computers, we have:

[tex]1000= -6t^{\frac{5}{3}} +1480\\\\6t^{\frac{5}{3}}= 1480-1000\\6t^{\frac{5}{3}}=480\\\\t^{\frac{5}{3}}=80\\\\t=\sqrt[\frac{5}{3} ]{80}[/tex]

Time, t = 13.86 ≈ 14 months.

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The solution to the exponential equation e¹⁻⁴ˣ = 2257 is x = (1 - ln(2257))/4. Using a calculator, we obtain a decimal approximation of x ≈ 0.423.

To solve this exponential equation, we need to isolate the variable "x". We can do this by taking the natural logarithm (ln) of both sides of the equation

ln(e¹⁻⁴ˣ) = ln(2257)

Using the property that ln(eᵃ) = a

(1 - 4x)ln(e) = ln(2257)

Since ln(e) = 1

1 - 4x = ln(2257)

Solving for "x"

x = (1 - ln(2257))/4

Using a calculator to obtain a decimal approximation for the solution

x ≈ 0.423

Therefore, the solution set in terms of natural logarithms is x = (1 - ln(2257))/4, and the decimal approximation for the solution is x ≈ 0.423.

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For a regular quadrilateral, each exterior angle measures 90 degrees, so the sum of the exterior angles is 4 times 90 degrees, or 360 degrees.

In a regular quadrilateral, all angles are equal. To find the sum of the measures of the exterior angles, we can follow these steps:

1. Determine the sum of the interior angles of a quadrilateral, which is always 360 degrees.
The sum of the measures of the exterior angles of any polygon, including a regular quadrilateral, is always 360 degrees. This is because each exterior angle of a polygon is formed by extending one of the sides of the polygon, and the sum of the exterior angles is equal to the sum of the measures of the angles formed by all the sides of the polygon.

2. Since it's a regular quadrilateral, divide the sum by the number of sides (4) to find the measure of each interior angle. 360 / 4 = 90 degrees.

3. To find the measure of each exterior angle, subtract the measure of the interior angle from 180 degrees (since they are supplementary). 180 - 90 = 90 degrees.

4. Multiply the measure of one exterior angle by the number of sides (4) to find the sum of the measures of the exterior angles. 90 * 4 = 360 degrees.

The sum of the measures of the exterior angles of a regular quadrilateral is 360 degrees.

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In a randomized block design, total variation in data is decomposed into three components: variation between blocks (SSB), variation between treatments within each block (SSE), and residual variation within each treatment and block combination (SST).

We can express the total sum of squares (Total SS) in a randomized block design as:

Total SS = SSB + SSE + SST

∑Yij² = SST + SSB + SSE and ∑Yij = bYi• + b∑y•j - bY

SSE = ∑(Yij - y•j - Yi• + Y)²

       = ∑Yij² - 2∑Yijy•j - 2∑YijYi• + 2∑YijY + b∑y•j² + b∑Yi•² - 2bY∑y•j - 2bY∑Yi• + bY²

       = SST + SSB + SSE - b∑y•j² - b∑Yi•² + 2bY∑y•j + 2bY∑Yi• - bY²

Rearranging and simplifying terms:

SSE = b∑y•j² + b∑Yi•² - 2bY∑y•j - 2bY∑Yi• + bY²

Multiplying both sides by k, the number of treatments:

kSSE = bk∑y•j² + bk∑Yi•² - 2bkY∑y•j - 2bkY∑Yi• + bkY²

Also, SST = ∑(Yij - Yi•)² and SSB = ∑(Yi• - Y)²

Therefore,

Total SS = SST + SSB + bk∑y•j² + bk∑Yi•² - 2bkY∑y•j - 2bkY∑Yi• + bkY²

Expanding the terms ∑Yi•² and ∑y•j² using the fact that ∑Yij² = SST + SSB + SSE:

Total SS = SST + SSB + bk(SST + SSB + SSE) - 2bkY∑y•j - 2bkY∑Yi• + bkY²

Simplifying the terms:

Total SS = bkSST + bkSSB + bkSSE - 2bkY∑y•j - 2bkY∑Yi• + bkY

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We have shown that f(x) = f(0) for all x ∈ (-1,1).

Since f is continuous at 0, we have:

lim x → 0 f(x) = f(0)

Since f(x) = f(x³) for all x ∈ (-1,1), we can substitute x = x³ and get:

f(x) = f(x³) = f(x⁹) = f(x²⁷) = ...

Since |x| < 1, we have x² < |x| < 1, and thus:

lim x² → 0 f(x²) = f(0)

Therefore, we can apply the limit of the sequence of nested intervals to obtain:

f(x) = f(x³) = f(x⁹) = f(x²⁷) = ... = lim n → ∞ f(x^(3ⁿ)) = lim y → 0 f(y) = f(0)

where we have made the substitution y = x^(3ⁿ), which implies that x = y^(1/(3ⁿ)) → 0 as n → ∞.

Thus, we have shown that f(x) = f(0) for all x ∈ (-1,1).

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Clark spends $ 12775 on these items which he does not need in a year (if we consider 365 days) where the average spend in a month is $35.

Clark finds that in an average month, he spends $35 on things he really doesn't need and can't afford.

Let us consider the month in consideration here to be of 30- days and ignore any months other number of days.

Thus, calculating the average, say x' , by formula, we get,

x' = (Summation of values of all observations ) / ( Number of observations)

⇒ 35 = Total spend / 30

⇒ Total spend = $ ( 35*30)

⇒ Total spend = $ 1050

Therefore, total spend on a year, that is 12 months (considering all months to be of 30- days ) = $( 1050*12) = $ 12600

But we know a year does not have 360 days. So we calculate the total spend on these 5 days where average month spend is $35 is $175.

Hence the total spend for a year with 365 days is = $( 12600 + 175 ) = $12775

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The area of the base of the pyramid is 81 square feet.

The formulation for the volume of a square pyramid is [tex]V = (1/3) * b^2 * h[/tex], in which" b" is the length of 1 aspect of the base and" h" is the height of the pyramid.

We are suitable to use this methodology to break for the length of one facet of the base, with a purpose to give us the area of the base.

[tex]114.75 = (1/3) * b^2 * 4.25[/tex]

Multiplying each sides by 3 gives

[tex]344.25 = b^2 * 4.25[/tex]

Dividing each angles by way of 4.25 gives

[tex]b^2 = 81[/tex]

Taking the square root of both angles gives

b = 9

Thus, the area of the base of the pyramid is

[tex]A = b^2 = 9^2 = 81[/tex]  square feet.

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This means that if event A occurs, event B cannot occur and vice versa.

A and B are mutually exclusive events if they have no outcomes in common. In other words, if A occurs, then B cannot occur and vice versa. Mathematically, if A and B are mutually exclusive events, then P(A and B) = 0.

Using the given probabilities, we can check if A and B are mutually exclusive by using the formula:

P(A or B) = P(A) + P(B) - P(A and B)

Substituting the given probabilities, we get:

0.7 = 0.3 + 0.4 - P(A and B)

Simplifying, we get:

P(A and B) = 0.3 + 0.4 - 0.7 = 0

Since P(A and B) = 0, we can conclude that A and B are mutually exclusive events. This means that if event A occurs, event B cannot occur and vice versa.

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We have found the measures of CD, CE, HD, GD, HG, and HF in triangle BCD, given that H is the circumcenter of the triangle.

In triangle BCD, the circumcenter H is the point where the perpendicular bisectors of the sides of the triangle intersect. This point is equidistant from the three vertices of the triangle.

Using the properties of the circumcenter, we can find the measures of various sides and angles of the triangle:

CD = 2FD, where FD is the foot of the perpendicular from H to CD.

CE = BE = 26, since H is equidistant from B and C.

HD = HC = 33, since H is equidistant from D and C.

GD = 1/2BD = 1/2(58) = 29, since H is equidistant from B and D.

HG = √HD² - GD² = √33² - 29² = 2√62 ≈ 15.75, using the Pythagorean theorem.

HF = √HD² - FD² = √33² - 32² = √65 ≈ 8.06, using the Pythagorean theorem.

Therefore, we have found the measures of CD, CE, HD, GD, HG, and HF in triangle BCD, given that H is the circumcenter of the triangle.

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Answer:

$1,593

Step-by-step explanation:

I=PRT

I=$2,276×14%×5

I=1,593.2 to nearest tenth

I=$1,593

40% of responses are considered ideal, which means that the majority of responses fall outside of the ideal range of 0 to 5 minutes.

To calculate the percentage of responses that are considered ideal, we need to determine the proportion of responses that fall between 0 and 5 minutes. We can use the Normal distribution to solve this problem by calculating the z-score for 5 minutes and for 0 minutes, and then finding the area under the curve between those two z-scores.

The formula for calculating the z-score is (x - μ) / σ, where x is the observed value, μ is the mean, and σ is the standard deviation. For 5 minutes, the z-score is (5 - 6) / 1.2 = -0.83, and for 0 minutes, the z-score is (0 - 6) / 1.2 = -5.

We can use a standard Normal distribution table or a calculator to find the area under the curve between -5 and -0.83, which is approximately 0.3997. Multiplying this by 100 gives us 39.97%, which we round to 40%.

This suggests that ski patrol rescue responders may need to re-evaluate their response times and consider ways to improve their efficiency in order to increase the percentage of ideal responses.

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Solving the Inequality will give us x > -1.25

We have the inequality:-

0. 2(x + 20) – 3 > –7 – 6. 2x

Here we are given a set of instructions and need to use them to get the final answer.

First, we need to use the distributive property. Using that, we will eliminate the brackets to get

0.2x + (0.2 X 20) - 3 > - 7 - 6.2x

or, 0.2x + 4 - 3 > - 7 - 6.2x

Now, we need to combine the like terms. Here it would be 4 and -3. Hence we get

0.2x + 1 > - 7 - 6.2x

Next, we need to use the addition property of inequality, which states that for terms a, b, c

if a > b

then, a + c > b + c

Hence here we will add 6.2x to get

0.2x + 1 + 6.2x > - 7 - 6.2x + 6.2x

or, 6.4x + 1 > - 7

Similarly, applying the subtraction property of inequality states

if a > b

then, a - c > b - c

Here we need to subtract 1 to get

6.4x + 1 - 1 > - 7 - 1

or, 6.4x > - 8

Using the division property will give us

x > - 8/6.4

or, x > 1.25

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The equation to determine the velocities of boxes is given by, v² = 2*a*d

To determine the velocities of the boxes when they move a distance d down the slope after being released from rest, we can use the following terms: velocity, box, and distance (d). Here's a step-by-step explanation:

1. Since the boxes are released from rest, their initial velocity (v0) is 0.
2. Let's assume the slope has an angle (θ) and the acceleration due to gravity (g) is 9.81 m/s².
3. Calculate the acceleration (a) of the boxes down the slope using the formula: a = g * sin(θ).
4. To find the final velocity (v) of the boxes after traveling a distance (d) down the slope, we can use the equation: v² = v0² + 2*a*d.

Since the boxes are released from rest, v0 is 0. Therefore, the equation simplifies to:

v² = 2*a*d

Now, substitute the acceleration (a) and distance (d) into the equation and solve for the final velocity (v) of the boxes.

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Yes, that is correct. The Gaussian elimination rules are essentially the same as the three basic row operations, which allow you to algebraically manipulate a matrix's rows.

You can interchange two rows, multiply a row by a constant, or add a row to another row. These rules are essential in solving systems of linear equations and finding the reduced row echelon form of a matrix. By applying these rules, you can transform a matrix into an equivalent matrix that is easier to work with and reveals important information about the system of equations or the matrix itself. The Gaussian elimination rules, also known as the three basic row operations, allow you to algebraically manipulate a matrix in order to solve systems of linear equations. These operations include:
1. Interchanging two rows (R2 ↔ R3)
2. Multiplying a row by a nonzero number (R1 → kR1, where k is a constant)
3. Adding a row to another row (R2 → R2 + 3R1)
These rules help simplify the matrix and ultimately obtain the unique solution for the system of equations.

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The total weight of all the cans that are heavier than 9 ounces is 29 ounces.

We have,

Looking at the line plot, we see that there are 4 cans weighing exactly 9 ounces, and 3 cans weighing more than 9 ounces (2 at 9.5 ounces and 1 at 10 ounces).

To find the total weight of all the cans weighing more than 9 ounces, we can calculate:

Total weight = (number of cans weighing 9.5 ounces) x (9.5 ounces per can) + (number of cans weighing 10 ounces) x (10 ounces per can)

Total weight = (2 cans x 9.5 ounces per can) + (1 can x 10 ounces per can)

Total weight = 19 + 10

Total weight = 29 ounces

Therefore,

The total weight of all the cans that are heavier than 9 ounces is 29 ounces.

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The spherical coordinate expression for F(x, y, z) is:

[tex]F(\rho , \theta , \phi) = \rho^5*sin^3(\theta)*cos^2(\theta)*sin(\phi)^2 + \rho^2*sin^2(\phi)^2, where \rho = \sqrt{x^2 + y^2 + z^2}, \theta = arctan(y/x), and \phi = arccos(z/\rho).[/tex]

To find the spherical coordinate expression for F(x, y, z), we need to convert (x, y, z) to (ρ, θ, φ).

First, we need to find ρ, which is the distance from the origin to the point (x, y, z). Using the formula for ρ in spherical coordinates, we have:

[tex]\rho = \sqrt{x^2 + y^2 + z^2}[/tex]

Next, we need to find θ and φ, which are the angles that the point (x, y, z) makes with the positive x-axis and positive z-axis, respectively. Using the formulas for θ and φ in spherical coordinates, we have:

θ = arctan(y/x)
φ = arccos(z/ρ)

Finally, we can express F(x, y, z) in terms of (ρ, θ, φ) using the following formula:

[tex]F(\rho, \theta , \phi) = \rho^5*sin^3(\theta)*cos^2(\theta)*sin(\phi)^2 + \rho^2*sin^2(\phi)^2[/tex]

Therefore, the spherical coordinate expression for F(x, y, z) is:

[tex]F(\rho , \theta , \phi) = \rho^5*sin^3(\theta)*cos^2(\theta)*sin(\phi)^2 + \rho^2*sin^2(\phi)^2, where \rho = \sqrt{x^2 + y^2 + z^2}, \theta = arctan(y/x), and \phi = arccos(z/\rho).[/tex].

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All the possible values of x are given as follows:

26 < x < 28.

In a triangle, the sum of the lengths of the two smaller sides has to be greater than the length of the greater side.

If 27 is the greater side, we have that:

x + 1 > 27

x > 26.

If x is the greater side, we have that:

x < 27 + 1

x < 28.

Hence the interval of possible values is given as follows:

26 < x < 28.

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No, The relation is not a function.

Domain = {9, 4, 1, 0}

Range = {-5, - 3, - 1, 0, 1, 3, 5}

We have to given that;

The relation is,

{(9,−5),(4,−3),(1,−1),(0,0),(1,1),(4,3),(9,5)}

We know that;

A relation between a set of inputs having one output each is called a function.

Here, Relation have;

(9, - 5) and (9, 5)

Thus, It does not satisfy the definition of function.

And, The value of domain of relation is,

Domain = {9, 4, 1, 0}

And, The value of range of relation is,

Range = {-5, - 3, - 1, 0, 1, 3, 5}

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The circle has a diameter of 10 and a radius of 5

the radius times itself ( 5 x 5 ) = 25

25 times pi (3.14) = 78.5

so the circle is 78.5, lets say square cm.

and the circumference is 31.41593 or 31.42  

we need to find the center point and the length of the radius. The center point is at 5. 1.  so h = 5  and  k = 1

Now let’s count from the center to a point on the circumference to find the length of the radius. 5

The radius is 5 so  r = 5

Now let’s plug everything into the standard form of a circle.

(x - h)²+ (y - k)² = r²