4(a). usa today reported that about 47% of the general consumer population in the united states is loyal to the automobile manufacturer of their choice. suppose chevrolet did a study of a random sample of 870 chevrolet owners and found that 488 (56%) said they would buy another chevrolet. does this indicate that chevrolet owners are more loyal than owners of different cars?

Considering the dot plot and visual inspection, it is likely that group B has a lower mean. The reason for this is because it has a higher proportion of it's measures to the left of the dot plot than group A.

The mean of a data-set is given by the sum of all observations in the data-set divided by the cardinality of the data-set, which represents the number of observations in the data-set.

The dot plot shows the number of instances that each observation appeared in the data-set, hence we use it to identify the position of the measures.

Group B has more dots at the left of the graph, meaning that the smaller measures are more common than in group A, and thus it more than likely has a lower mean.

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Answer: Area of a trapezoid is 1/2 x (b1+b2) x height

Step-by-step explanation:

To solve the integral ∫x√(25+x^2)dx, we can make the substitution x=5tanθ. This gives us dx=5sec^2θ dθ, and we can rewrite the integral as ∫5tanθ√(25+25tan^2θ)(5sec^2θ)dθ. Simplifying this expression using trigonometric identities, we get ∫25sec^3θdθ.

To solve this integral, we can use integration by parts, with u=secθ and dv=sec^2θdθ. This gives us v=tanθ and du=secθtanθdθ. Plugging these values into the integration by parts formula, we get:

∫25sec^3θdθ = 25secθtanθ - 25∫tan^2θsecθdθ.

We can simplify the remaining integral using the trigonometric identity tan^2θ+1=sec^2θ, which gives us:

∫tan^2θsecθdθ = ∫(sec^2θ-1)secθdθ = ∫sec^3θdθ - ∫secθdθ.

We can solve the first integral using integration by parts again, and the second integral is a standard integral that can be easily evaluated. After simplifying and substituting back in x, we get the final answer:

∫x√(25+x^2)dx = 1/3(25+x^2)^(3/2) + C.

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To find the radius of convergence, we use the ratio test. The ratio test states that if the limit of the absolute value of the ratio of consecutive terms is less than 1, then the series converges absolutely. If the limit is greater than 1, then the series diverges. If the limit is equal to 1, then the test is inconclusive.

In this case, we have the series (-1)^(n-1)/n5^n. Taking the absolute value of the ratio of consecutive terms, we get |((-1)^n)/(n+1)(5^(n+1))) / ((-1)^(n-1)/n5^n)| = 1/(5(n+1)). Taking the limit as n approaches infinity, we get 1/5. Since the limit is less than 1, the series converges absolutely.

The radius of convergence is equal to the reciprocal of the limit we just found, which is 5. Therefore, the series converges for all x values between -5 and 5.

To find the interval of convergence, we need to test the endpoints. When x=5, the series becomes (-1)^(n-1)/(5n), which is an alternating series. The alternating series test tells us that the series converges if the absolute value of the terms decreases and approaches zero. In this case, the terms are decreasing in absolute value but do not approach zero, so the series diverges at x=5.

When x=-5, the series becomes (-1)^(n-1)/(-5n), which is also an alternating series. The same reasoning as above tells us that the series converges at x=-5.

Therefore, the interval of convergence is [-5,5).

The radius of convergence of the series (-1)^(n-1)/n5^n is 5, and the interval of convergence is [-5,5). To find the radius of convergence, we used the ratio test and found that the limit of the absolute value of the ratio of consecutive terms is 1/5. To find the interval of convergence, we tested the endpoints and found that the series converges at x=-5 and diverges at x=5.

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The interval of convergence is [-5,5). We apply the ratio test to determine the radius of convergence. The ratio test asserts that the series converges absolutely if the limit of the absolute value of the ratio of consecutive terms is smaller than 1.

The series diverges if the limit is bigger than 1. The test is not convincing if the limit is equal to 1.The series in question is (-1)(n-1)/n5n. The result is |((-1)n)/(n+1)(5(n+1))] / ((-1)(n-1)/n5n)| = 1/(5(n+1) when we take the absolute value of the ratio of successive words. When we take the limit as n gets closer to infinity, we get 1/5. Since 1, the limit, the series completely converges.

The radius of convergence is equal to the reciprocal of the limit we just found, which is 5. Therefore, the series converges for all x values between -5 and 5.

To find the interval of convergence, we need to test the endpoints. When x=5, the series becomes (-1)[tex]^(n-1)/(5n)[/tex], which is an alternating series. The alternating series test tells us that the series converges if the absolute value of the terms decreases and approaches zero. In this case, the terms are decreasing in absolute value but do not approach zero, so the series diverges at x=5.

When x=-5, the series becomes (-1)[tex]^(n-1)/(-5n),[/tex]which is also an alternating series. The same reasoning as above tells us that the series converges at x=-5.

Therefore, the interval of convergence is [-5,5).

The radius of convergence of the series (-1)^(n-1)/n[tex]5^n[/tex] is 5, and the interval of convergence is [-5,5). To find the radius of convergence, we used the ratio test and found that the limit of the absolute value of the ratio of consecutive terms is 1/5. To find the interval of convergence, we tested the endpoints and found that the series converges at x=-5 and diverges at x=5.

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For the region under f(x) = 4x^2 on [0, 2], the sum of the areas of the upper approximating rectangle approaches 32/3, or lim n→∞ rn = 32/3.

To show this, we can use the Riemann sum, which approximates the area under the curve by dividing it into a finite number of subintervals and using rectangles to approximate the area of each subinterval. The upper Riemann sum is obtained by using the height of the rectangle with the maximum value of the function in each subinterval.

For this specific function and interval, the width of each subinterval is 2/n, and the height of the upper rectangle in each subinterval is f(i(2/n)), where i is the index of the subinterval. The sum of the areas of the upper rectangles is then given by:

(2/n)Σ[1≤i≤n]f(i(2/n))

Substituting the function f(x) = 4x^2 and simplifying, we get:

(8/n^3)Σ[1≤i≤n]i^2

Using the formula for the sum of squares of the first n natural numbers, Σ[1≤i≤n]i^2 = n(n+1)(2n+1)/6, and simplifying further, we get:

(8/n^3) * n(n+1)(2n+1)/6 = (4/3) * (n+1/2) * (2n+1)/n^2

Taking the limit as n approaches infinity, we get:

lim n→∞ (4/3) * (n+1/2) * (2n+1)/n^2 = 32/3

Therefore, the sum of the areas of the upper approximating rectangles approaches 32/3 as the number of subintervals approaches infinity, or lim n→∞ rn = 32/3.

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Answer:

x = 15

Step-by-step explanation:

To solve this problem, isolate x

Original equation:

-10 + x = 5

Add 10 to both sides:

-10 + 10 + x = 5 + 10

Cancel/simplify:

x = 5 + 10

Add:

x = 15

~~~Harsha~~~

Answer:

x=15

Step-by-step explanation:

We are given and we have to isolate the x variable:

-10+x=5

add 10 to both sides

x=15

Hope this helps! :)

The area of the trapezoid is 25. 8 ft²

We can see from information given that the shape is a trapezoid.

Hence, the formula for calculating the area of a trapezoid is expressed as;

A = a + b/2 h

Such that the parameters of the given equation are;

Substitute the value, we have that;

Area = 2.7 + 5.9)/2 × 6

add the values, we have;

Area = 8. 6/2 ×6

Divide the values, we have;

Area = 25. 8 ft²

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Answer: y=(7/8)x+6

Step-by-step explanation:

The slope is (7/8) and the y-intercept is 6. The slope-intercept form of a line is y=mx+b.

To find the area of the region bounded by the polar curves θ = π and r = 10θ, 0 ≤ θ ≤ 1.5π, we use the formula for the area enclosed by a polar curve: A = 1/2 ∫[θ1,θ2] (r(θ))^2 dθ,where θ1 and θ2 are the angles at which the curves intersect.

In this case, the curves intersect at θ = π and r = 10π, so θ1 = π and θ2 = 1.5π. We substitute r = 10θ into the formula and integrate:

A = 1/2 ∫[π,1.5π] (10θ)^2 dθ

= 1/2 ∫[π,1.5π] 100θ^2 dθ

= 50 ∫[π,1.5π] θ^2 dθ

= 50 [θ^3/3] [π,1.5π]

= 50 (1.5π)^3/3

= 562.5π^3

Therefore, the area of the region bounded by the polar curves θ = π and r = 10θ, 0 ≤ θ ≤ 1.5π is 562.5π^3 square units.

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S is a function from the set of positive integers to the set of positive integers, defined as the sum of the positive divisors of a given integer. The questions to be answered are whether S is one-to-one, onto, or a one-to-one correspondence.

To determine if S is one-to-one, we need to check whether different inputs to the function produce different outputs. In other words, if S(a) = S(b) for some positive integers a and b, does it follow that a = b? To prove that S is not one-to-one, we can provide a counterexample. For example, S(6) = 1 + 2 + 3 + 6 = 12, and S(28) = 1 + 2 + 4 + 7 + 14 + 28 = 56, but 6 ≠ 28. Therefore, S is not one-to-one.

To determine if S is onto, we need to check whether every positive integer is in the range of the function. In other words, for every positive integer y, is there some positive integer x such that S(x) = y? To prove that S is not onto, we can provide a counterexample. For example, there is no positive integer x such that S(x) = 2. Therefore, S is not onto.

A function is a one-to-one correspondence if it is both one-to-one and onto. Since S is not one-to-one and not onto, it is not a one-to-one correspondence.

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If you randomly draw one card from the deck, there is about a 26.92% chance that you will get either a Jack or a Spade.

Since there is only one Jack of Spades, we have one favorable outcome for drawing a Jack. Additionally, there are 13 Spades in the deck, including the Jack of Spades. Therefore, the number of favorable outcomes for drawing a Spade is 13.

Total number of favorable outcomes = Number of Jacks + Number of Spades

= 1 + 13

= 14

Total number of possible outcomes

In a deck of 52 cards, each card is unique. Therefore, the total number of possible outcomes is equal to the total number of cards in the deck, which is 52.

Now that we have determined the number of favorable outcomes and the total number of possible outcomes, we can calculate the probability using the following formula:

Probability = Number of favorable outcomes / Total number of possible outcomes

Substituting the values we found:

Probability = 14 / 52

Simplifying the fraction:

Probability = 7 / 26

So, the probability of drawing a Jack or a Spade from a standard deck of 52 cards is 7/26, or approximately 0.2692, which can also be expressed as 26.92%.

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The solution is: the value of m in the equation below when j = 24 and

n = 3 is: m=4

Here, we have,

given that,

the equation is:

j=2mn,

and, when j = 24 and n = 3.

now, we have to find the value of m in the equation,

Let j = 24 and n=3

24 = 2*m*3

Simplify

so, we have,

24 = 6*m

Divide each side by 6

we get,

24/6 = 6m/6

4=m

Hence, The solution is: the value of m in the equation below when j = 24 and  n = 3 is: m=4

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The 95% confidence interval for the difference in the proportions of white and minority students who support the principal lies between -0.056 and 0.391.  

First, we shall  use the formula for a confidence interval for the difference in proportions:

Let:

p1 = proportion of white students who support the principal

p2 = proportion of minority students who support the principal.

p1 = 45/56 = 0.8036

p2 = 21/33 = 0.6364

Let:

n1 =  number of white students surveyed  

n2 =  number of minority students surveyed.

n1 = 56

n2 = 33

The point estimate for the difference in proportions is:

p1 - p2 = 0.8036 - 0.6364 = 0.1672

The standard error for the difference in proportions is:

SE = [tex]\sqrt{ [p1(1-p1)/n1] + [p2(1-p2)/n2] }[/tex]

SE =[tex]\sqrt{ [(0.8036)(1-0.8036)/56] + [(0.6364)(1-0.6364)/33] }[/tex]

SE = 0.1121

So, the 95% confidence interval for the difference in proportions is:

(p1 - p2) ± (critical value) * (SE)

where the critical value is based on a t-distribution with (n1 + n2 - 2) degrees of freedom at the 0.025 level (two-tailed test).

Using a t-distribution table, with 87 degrees of freedom, the critical value is 1.987.

The 95% confidence interval for the difference in proportions is:

0.1672 ± 1.987 * 0.1121

0.1672 ± 0.223

(−0.056, 0.391)

Thus, we can be 95% confident that the true difference in the proportions of white and minority students who support the principal lies between -0.056 and 0.391.  

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The y-intercept of the function f(x) is 1.

The y-intercept of a function is the point where the graph of the function intersects the y-axis. It represents the value of the function when x=0. To find the y-intercept of a function, we can substitute x=0 into the function and evaluate it.

In the case of the function [tex]f(x) = 2x^2 - 2x + 1[/tex], when x=0, we have:

[tex]f(0) = 2(0)^2 - 2(0) + 1 = 1[/tex]

Therefore, the y-intercept of the function f(x) is 1. This means that the graph of the function intersects the y-axis at the point (0, 1).

Knowing the y-intercept is important when graphing the function, as it provides a reference point for drawing the graph. Additionally, the y-intercept can provide information about the behavior of the function as x approaches infinity or negative infinity.

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The bearing of the ship from boston is approximately s36.

to solve this problem, we need to use vector addition to find the displacement of the ship from boston to its current position. we can start by breaking down the ship's motion into two parts: the first hour of motion at 10 nm/hr on a bearing of s80°e, and the next 2 hours of motion at 20 nm/hr on a bearing of s45°w (which is equivalent to n45°e).

for the first hour of motion, we can find the ship's initial displacement as follows:

distance = speed × time         = 10 nm/hr × 1 hr

        = 10 nm

using trigonometry, we can find the horizontal and vertical components of this displacement:

horizontal distance = 10 nm × cos(80°)                     = 1.68 nm (rounded to two decimal places)

vertical distance = 10 nm × sin(80°)

                  = 9.92 nm (rounded to two decimal places)

, the ship's initial displacement from boston is 1.68 nm to the east and 9.92 nm to the south.

for the next 2 hours of motion, we can find the ship's additional displacement as follows:

distance = speed × time         = 20 nm/hr × 2 hr

        = 40 nm

using trigonometry again, we can find the horizontal and vertical components of this displacement:

horizontal distance = 40 nm × cos(45°)

                    = 28.28 nm (rounded to two decimal places)

vertical distance = 40 nm × sin(45°)                   = 28.28 nm (rounded to two decimal places)

, the ship's additional displacement is 28.28 nm to the northeast.

to find the ship's total displacement, we can add the initial and additional displacements using vector addition:

horizontal displacement = 1.68 nm - 28.28 nm

                       = -26.60 nm (rounded to two decimal places)

vertical displacement = 9.92 nm + 28.28 nm                      = 38.20 nm (rounded to two decimal places)

the negative sign for the horizontal displacement indicates that the ship is west of boston. we can find the bearing of the ship from boston using trigonometry:

tan(θ) = horizontal displacement / vertical displacement

θ = arctan(horizontal displacement / vertical displacement)

θ = arctan(-26.60 nm / 38.20 nm)

θ ≈ -36.6° (rounded to one decimal place)

however, we need to adjust this   angle    by adding 180° since the ship is now in the southern hemisphere.

θ = -36.6° + 180°θ ≈ 143.4° (rounded to one decimal place) 6°w (or n36.6°e).

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Answer:

i think its 8

Step-by-step explanation:

Answer:

3201.3ft³

Step-by-step explanation:

V=πr²h

Large container:

V=π·11²·19

V=7222.52

Small container

V=π·8²·20

V=4021.24

7222.52-4021.24=3201.28

Rounded to the nearest tenth is 3201.3

Answer: =133.3%

Step-by-step explanation:

Formula for percent change:

[tex]\frac{difference of 2 numbers}{original} *100[/tex]                 >substitute

[tex]\frac{\frac{7}{8} -\frac{3}{8} }{\frac{3}{8} } *100[/tex]                                         >subtract top

[tex]=\frac{\frac{4}{8} }{\frac{3}{8} }*100[/tex]                                         >simplify/reduce top

[tex]=\frac{\frac{1}{2} }{\frac{3}{8} }*100[/tex]                                         >Divide fractions(Keep the first, Change

                                                           the sign, Flip the 2nd fraction

= [tex]\frac{1}{2} *\frac{8}{3} *100\\[/tex]                                     >Reduce fractions and multiply

= [tex]\frac{4}{3} *100[/tex]

=133.3%

Therefore, The approximate normal probability that more than 39 accounts receivable will contain errors is 2.28%.

The problem involves calculating the probability of finding errors in a sample of accounts receivable. We know that the true proportion of accounts receivable with errors is 0.20. The sample size is 225 accounts receivable. We want to find the probability of finding more than 39 accounts with errors. We can use the normal distribution formula to calculate this probability. By converting the problem to a standard normal distribution, we can use a z-score table to find the probability. The probability is approximately 0.0228, or 2.28%. This means that there is a 2.28% chance of finding more than 39 accounts with errors in the sample.

Therefore, The approximate normal probability that more than 39 accounts receivable will contain errors is 2.28%.

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Answer:

Linear

Step-by-step explanation:

A linear graph is a straight line.

After considering all the given data we conclude that yes  41 is a square modulo 1 000 000, under the condition that both congruences x₂ ≡ 41 mod 26 and x₂ ≡ 41 mod 56 have solutions.

We can apply the Chinese Remainder Theorem (CRT) to solve this problem.

Firstly, we have to evaluate the solutions of x² ≡ 41 mod 26 and x² ≡ 41 mod 56.

For x² ≡ 41 mod 26, we clearly see that x² ≡ 15 mod 26 is a solution since 15² = 225 ≡ 41 mod 26.

For x² ≡ 41 mod 56, we can apply the fact that x² ≡ a mod p has solutions if and only if [tex]a^{(P-1)} /2[/tex] ≡ 1 mod p (Euler's criterion).

Since p = 56 = 7 × 8, we have:

[tex]a^{(p-1)} /2[/tex] = a²¹ ≡ (a⁷)³ ≡ (-1)³ ≡ -1 mod p

Hence, x² ≡ 41 mod 56 has no solutions.

Now we can apply CRT to find the solutions of x² ≡ 41 mod (26 × 56) = 1456.

Since gcd(26,56) = 2, we have:

26 × u + 56 × v = gcd(26,56) = 2

Evaluating  this equation gives us u = -13 and v = 6.

So, the solutions of x² ≡ 41 mod (26 × 56) are:

x ≡ (15 × 56 × 6 - (-13) × 26 × (-1)) mod (26 × 56) = 937 or

x ≡ (-15 × 56 × 6 - (-13) × (-26) × (-1)) mod (26 × 56) = 519.

Hence, there are two solutions for x modulo one million: 519 and 481.

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Using the relation between velocity, distance and time, the equation that relates x and y is given by x + y - 3 = 0.

Velocity is distance divided by time, so

v = d/t

In this case , Austin wants to run 30 km at a rate of 10 km per hour, this can be represented as

10t = 30

t = 3.

The total time is 3 hours.

Looking at x as the number of hours he runs and y the number of hours he walks, along with the total time, the equation is given by

x + y = 3.

In standard form

x + y - 3 = 0.

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The absolute maximum value is 3√3, and the absolute minimum value is 3 on the set d.

In mathematics, a function is a unique arrangement of the inputs (also referred to as the domain) and their outputs (sometimes referred to as the codomain), where each input has exactly one output and the output can be linked to its input.

To find the absolute maximum and minimum values of the function f(x, y) = xy² on the set d = {(x, y) | x ≥ 0, y ≥ 0, x² y² ≤ 3}, we can employ the method of Lagrange multipliers. This method allows us to optimize a function subject to certain constraints.

Let's define the function g(x, y) = x² y² - 3, which represents the constraint x² y² ≤ 3. We can now set up the following equations:

1. ∇f = λ∇g

2. x² y² = 3 (constraint equation)

Here, ∇f represents the gradient of f(x, y), and ∇g represents the gradient of g(x, y). λ is the Lagrange multiplier.

First, let's calculate the partial derivatives of f(x, y) and g(x, y):

∇f = (∂f/∂x, ∂f/∂y) = (y², 2xy)

∇g = (∂g/∂x, ∂g/∂y) = (2xy², 2x²y)

Setting up the equations:

1. y² = λ * 2xy²

2. 2xy = λ * 2x²y

3. x² y² = 3 (constraint equation)

From equation 1, we can deduce two possibilities:

  a) y² = 0 (which implies y = 0)

  b) λ = 1/2x

For case a) y = 0, substituting it into equation 3 gives us x² * 0² = 3, which is not possible since x² * 0 = 0 ≠ 3. Therefore, case a) is not valid.

Now let's consider case b) λ = 1/2x. Substituting this into equation 2, we get:

2xy = (1/2x) * 2x²y

2xy = xy

Cancelling out the common factors of xy, we have x = 1.

Substituting x = 1 into equation 3, we find:

1 * y² = 3

y² = 3

y = √3

Thus, we have the critical point (1, √3) that satisfies the constraints.

Next, we need to check the boundaries of the feasible region, which is defined by x ≥ 0, y ≥ 0, and x² y² ≤ 3.

When x = 0, the constraint equation becomes 0 * y² = 3, which is not valid.

When y = 0, the constraint equation becomes x² * 0² = 3, which is not valid.

Now, let's consider the boundary when x² y² = 3:

When x = √3 and y = √3, the constraint equation is satisfied.

In summary, we have the following critical points and boundary points:

- Critical Point: (1, √3)

- Boundary Point: (√3, √3)

Finally, we need to evaluate the function f(x, y) = xy² at these points to find the absolute maximum and minimum values.

For the critical point (1, √3):

f(1, √3) = 1 * (√3)² = 1 * 3 = 3

For the boundary point

(√3, √3):

f(√3, √3) = √3 * (√3) = √3 * 3 = 3√3

Therefore, the absolute maximum value is 3√3, and the absolute minimum value is 3 on the set d.

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Answer; X=14

Step-by-step explanation:

14 - 6 = 8 and 8+4 =12

CYA BESTIE!

The approximation of ∫10sin(t)t dt is 5.000018, rounded to six decimal places.

Using the given approximation, we have:

sin(t) ≈ t − t^3/6 + t^5/120 − t^7/5040

Multiplying both sides by t and integrating from 0 to 10, we get:

∫0^10 sin(t) t dt ≈ ∫0^10 (t^2/1! − t^4/3! + t^6/5! − t^8/7!) dt

Using the power rule of integration, we get:

∫0^10 sin(t) t dt ≈ [t^3/3! − t^5/5! + t^7/7! − t^9/9!]0^10

Substituting the limits of integration and simplifying, we get:

∫0^10 sin(t) t dt ≈ (10^3/3! − 10^5/5! + 10^7/7! − 10^9/9!)/6

Calculating the numerical value using a calculator, we get:

∫0^10 sin(t) t dt ≈ 5.000018

Therefore, the approximation of ∫10sin(t)t dt is 5.000018, rounded to six decimal places.

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To find the probability P(x ≤ 1/4) when the probability density function is f(x) = 2(1-x)² on the interval [0, 1], you'll need to integrate the density function over the desired range.

To find p(x ≤ 1/4), we need to integrate the probability density function from 0 to 1/4.

P(x ≤ 1/4)=∫(0 to 1/4) 2(1-x)² dx
P(x ≤ 1/4) = [(-2/3)(1-x)³) from 0 to 1/4
P(x ≤ 1/4) = (-2/3)(1/64)3 + (2/3)(1)3
P(x ≤ 1/4) = 1/12
Therefore, the probability that x is less than or equal to 1/4 is 1/12.

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Answer:

false

Step-by-step explanation:

False. We can use multilinear regression analysis when some or all of the independent variables in the model are continuous, categorical, or a combination of both.