Use cylindrical or spherical coordinates, whichever seems more appropriate.

Find the volume enclosed by the torus rho=4sin(φ)

The answer is (b) x+y=C.

The given equation is [tex]xdy + ydx = 0.[/tex]

We can rewrite this equation as:

dy/dx = -y/x

This is a first-order linear differential equation that can be solved using separation of variables.

We can write it as:

dy/y = -dx/x

Integrating both sides, we get:

ln|y| = -ln|x| + ln|C|

where C is the constant of integration.

Simplifying this expression, we get:

ln|y| = ln|C/x|

Taking the exponential of both sides, we get:

|y| = |C/x|

Since |C| is a constant, we can replace it with another constant, say k, giving:

|y| = k/|x|

where k is a non-zero constant.

Now, we can rewrite this expression as:

y = ± k/x

where the ± sign depends on the sign of y.

Therefore, the solution to the differential equation xdy + ydx = 0 is y = ± k/x.

We can rewrite this solution in different forms:

a) y = Cx, where C = ± k

b) x + y = C, where C = k/2

c) xy = C, where C = ± k^2

d) x = Cy, where C = ± k

Therefore, the answer is (b) x+y=C.

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The approximate distance between Earth and the Andromeda galaxy is 2,500,000 x 365 x 24 x 3,600 x 300,000 km.

To calculate the approximate distance between Earth and the Andromeda galaxy, you should use the given distance in light years, the number of days in a year, the speed of light, and the conversion from days to seconds. Here's the step-by-step explanation:

1. You know that the distance is 2.5 million light years or 2,500,000 light years.
2. One year has 365 days.
3. The speed of light is 300,000 km/second.
4. One day has 24 hours, and one hour has 3,600 seconds.

Now, you can calculate the distance:

Distance = (2,500,000 light years) x (365 days/year) x (24 hours/day) x (3,600 seconds/hour) x (300,000 km/second)
This matches option D.

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The Intermediate Value Theorem does not conclude the value of the function at any specific point within the interval. It only guarantees the existence of at least one point where the function takes on a certain value within the given interval.

The Intermediate Value Theorem (IVT) states that if a continuous function, f(x), is defined on a closed interval [a, b] and k is a value between f(a) and f(b), then there exists at least one value c in the interval (a, b) such that f(c) = k.

However, the Intermediate Value Theorem does not conclude the following:

1. The existence of a unique value c: There may be multiple values in the interval (a, b) that satisfy f(c) = k.

2. That the function is differentiable or continuous outside the interval [a, b].

3. That the function has a local maximum or minimum value within the interval [a, b].

In summary, the Intermediate Value Theorem only guarantees the existence of at least one point where the function equals a specified value within a given interval, but it does not provide information about the uniqueness of that point, differentiability, or the presence of local extrema.

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The recursive rule for the sequence given is aₙ = aₙ₋₁ + 13.

Given that, a sequence,

position, n = 1 2 3 4 5

term, f(n) = 5 18 31 44 57

We need to write the recursive rule for the sequence,

So,

a₁ = 5, a₂ = 18

18-5 = 13

a₃ = 31, a₄ = 44

44-31 = 13

Therefore,

We see that, the preceding term is 13 less than the succeeding term,

We can write,

aₙ = aₙ₋₁ + 13

Hence, the recursive rule for the sequence given is aₙ = aₙ₋₁ + 13.

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The equation that represents this situation, if k is the number of hours Keith worked is C. k + 3 = 12

A statement that affirms the equivalence of two expressions that are joined by the equals sign "=" is known mathematically as an equation. If Jason worked 12 hours, 3 more than Keith did, and k is the amount of hours Keith worked, then k + 3 = 12 is the proper equation to reflect the circumstance.

According to this calculation of the equation, the total number of hours Keith worked (k) plus the additional three hours equals 12, which agrees with the fact that Jason put in three more hours of labour than Keith did and worked for a total of 12 hours.

Complete Question:

Jason worked 3 more hours than Keith. Jason worked 12 hours. Which equation represents this situation, if k is the number of hours Keith worked?

A. 12 + k = 3

B. 12k = 3

C. k + 3 = 12

D. 3k = 12

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a)  The bias does not approach zero as A approaches infinity, e^-X is not asymptotically unbiased.

b)  if Y₁ is the best unbiased estimator of P(X=0), we need to compare its MSE with the MSE of any other unbiased estimator.

c) in terms of MSE, Y₁ is better than e^-X with n = 10 and λ = 1.

(a) To check if e^-X is an unbiased estimator of P(X=0), we need to calculate its expected value and check if it is equal to P(X=0).

The moment generating function of Poi(A) is M(t) = exp(A(e^t -1)), and the moment generating function of -X is M(-t) = exp(A(1 - e^t)).

Using the moment generating function of -X, we can calculate the expected value of e^-X as follows:

E(e^-X) = E(exp(-X log(e))) = M(-log(e)) = exp(A(1 - e^-1))

Now, we need to check if E(e^-X) = P(X=0). Since P(X=0) = exp(-A), we can see that the estimator e^-X is biased. The bias is given by B(e^-X) = E(e^-X) - P(X=0) = exp(A(1-e^-1)) - exp(-A).

To check if the bias is asymptotically unbiased, we need to take the limit as A approaches infinity.

lim(A → ∞) B(e^-X) = lim(A → ∞) exp(A(1-e^-1)) - exp(-A) = ∞

Since the bias does not approach zero as A approaches infinity, e^-X is not asymptotically unbiased.

To check if e^-X is the best unbiased estimator of P(X=0), we need to compare its mean squared error (MSE) with the MSE of any other unbiased estimator.

(b) Y₁ is an unbiased estimator of P(X=0) if P(Y₁ = 1) = P(X=0) and P(Y₁ = 0) = 1 - P(X=0). Since Y₁ Ber(P(X=0)), we have

P(Y₁ = 1) = P(X=0) and P(Y₁ = 0) = 1 - P(X=0), which means that Y₁ is an unbiased estimator of P(X=0).

The bias of Y₁ is zero, so it is unbiased and there is no need to check if it is asymptotically unbiased. To check if Y₁ is the best unbiased estimator of P(X=0), we need to compare its MSE with the MSE of any other unbiased estimator.

(c) Using the fact that E(Xi) = λ and Var(Xi) = λ, we can calculate the MSE of e^-X and Y₁ as follows:

MSE(e^-X) = E((e^-X - P(X=0))^2) = Var(e^-X) + B(e^-X)^2 = exp(A(e^-1 - 2)) + (exp(A(1-e^-1)) - exp(-A))^2 - exp(-2A)

MSE(Y₁) = E((Y₁ - P(X=0))^2) = Var(Y₁) = P(X=0)(1-P(X=0)) = exp(-λ)(1-exp(-λ))

Substituting n = 10 and λ = 1, we get:

MSE(e^-X) ≈ 0.1381 + (exp(9)(1-e^-9))^2 - exp(-2) ≈ 1.3869

MSE(Y₁) ≈ exp(-1)(1-exp(-1)) ≈ 0.3935

Therefore, in terms of MSE, Y₁ is better than e^-X with n = 10 and λ = 1.

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The length of the line segment AC is 25.5 cm.

A line segment in geometry is a section of a line that has two clearly defined ends as its boundaries. It may be compared to a straight line that has two points where it begins and ends. Letters or points on the line, such as A and B, are frequently used to represent the two ends of a line segment. In contrast to a line, which extends forever in both directions, a line segment has a limited length. A ruler or other measuring device can be used to determine the length of a line segment.

To find the length of segment AC, we can use the fact that the sum of the lengths of two segments on a line is equal to the length of the entire line. That is:

AB + BC = AC

Substituting the given values, we get:

12 cm + 13.5 cm = AC

Simplifying:

AC = 25.5 cm

Therefore, the length of segment AC is 25.5 cm.

There is only one possible answer for the length of segment AC since it is uniquely determined by the lengths of segments AB and BC.

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The value of b as shown from the steps below is -21.

An equation is an expression that can be used to show the relationship between two or more numbers and variables using mathematical operators.

Given the equation:

4(b + 5) = 3b - 1

Opening the parenthesis:

4b + 20 = 3b - 1

Subtracting 3b from both sides:

b + 20 = -1

Subtracting 20 from both sides:

b = -21

The value of b is -21.

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The producers' surplus if the market price is set at $8/unit is $21000

Given that

Price, p = 36 + 2.8x

The quantity  function is

q = 100x

So, the revenue at $8/unit is

R = 100x * 8

R = 800x

The total cost is calculated as

T(x) = (36 + 2.8x) * 100x

By calculation, we have the producers' surplus function to be

P = (36 + 2.8x) * 100x - 800x

Differentiate and set to 0

-560x - 2800 = 0

So, we have

x = 5

Recall that

P = (36 + 2.8x) * 100x - 800x

So, we have

P = (36 + 2.8 * 5) * 100 * 5 - 800 * 5

P = 21000

Hence, the producers' surplus is 21000

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The surface area of the prism is determined as 300 yd².

The surface area of the prism is calculated as follows;

S.A = bh + (s₁ + s₂ + s₃)L

where;

The surface area of the prism is calculated as;

S.A = 5 (12) + (5 + 12 + 13) x 8

S.A = 60 yd² + 240 yd²

S.A = 300 yd²

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Therefore, the average of the squared distance between the origin and points in the solid cylinder D is 1/2.

The average of the squared distance between the origin and points in the solid cylinder D, we need to integrate the squared distance over the volume of the cylinder and then divide by the volume. The squared distance between the origin and a point (x, y, z) is given by:

d² = x² + y² + z²

The volume of the cylinder is given by:

V = πr²h = π(5²)(2) = 50π

The integral of the squared distance over the volume of the cylinder is:

∭d² dV = ∫₀²π ∫₀⁵ ∫₀² (x² + y² + z²) dz dx dy

Integral by integrating with respect to z first:

∫₀² (x² + y² + z²) dz = x² + y² + 2z³/3 evaluated from z = 0 to z = 2

= x² + y² + (16/3)

Expression back into the integral and integrating with respect to x and y gives:

∭d² dV = ∫₀²π ∫₀⁵ (x² + y² + (16/3)) dx dy

= ∫₀²π [(x³/3) + xy² + (16/3)x] evaluated from x = 0 to x = 5 dy

= ∫₀²π [(125/3) + 5y² + (80/3)] dy

= [(125/3)y + (5/3)y³ + (80/3)y] evaluated from y = 0 to y = √(25-x²)

= [(125/3)√(25-x²) + (5/3)(25-x²)√(25-x²) + (80/3)√(25-x²)] evaluated from x = 0 to x = 5

∭d² dV = 25π

Dividing by the volume of the cylinder gives the average of the squared distance:

(1/V) ∭d² dV = (1/50π) (25π) = 1/2

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Correct Question:

Find the average of the squared distance between the origin and points in the solid cylinder D = {(x,y,z): x² + y² ≤ 25, 0 ≤ z ≤ 2}. The average of the squared distance is (Simplify your answer. Type an integer or a fraction. )

Answer:

4 muffins to each friend

Step-by-step explanation:

72-60=3x

12=3x

4=x

The probability of either event A or event B occurring is 1 or 100%, since they are the only two possible outcomes. The probability of event B occurring alone is also 1 or 100%.

To find the probability that either event A or event B will occur, we can add their individual probabilities and then subtract the probability that both events occur, since we don't want to count this intersection twice. So, we have

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

Plugging in the given values

P(A or B) = 6/20 + 20/20 - 6/20 = 20/20 = 1

So the probability that either event A or event B will occur is 1 or 100%.

To find the probability of event B, we simply use the given probability

P(B) = 20/20 = 1

So the probability of event B is also 1 or 100%.

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Answer:

its 0.50

Step-by-step explanation:

The area of the rectangle is 3/8 square units.

Multiplying 1/2 by 3/4 gives us: (1/2) x (3/4) = 3/8. This means that if we have a rectangle with a length of 1/2 and a width of 3/4, the area of the rectangle is 3/8.

To calculate the area of a rectangle, we use the formula A = lw, where A represents the area, l represents the length, and w represents the width. So, if we plug in the values for length and width, we get:

A = (1/2) x (3/4) = 3/8

Area = (1/2) x (3/4) = 3/8 square units.

Therefore, the area of the rectangle is 3/8 square units.

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Complete Question:

Multiply 1/2 and 3/4 and figure out the area of the rectangle.

The surface area of the triangular base prism is 174 ft².

The prism above is a triangular prism. Therefore, let's find the surface area of the triangular prism as follows:

The prism has two triangular faces and three rectangular faces.

Therefore,

area of the triangle = 1 / 2 bh

where

Therefore,

area of the triangle = 1 / 2 × 6 × 4

area of the triangle = 24 / 2

area of the triangle = 12 ft²

Therefore,

area of the rectangle = l × w

where

Hence,

area of the rectangle =  8 × 5 = 50 ft²

Surface area of the triangular prism = 12(2) + 3(50)

Surface area of the triangular prism = 24 + 150

Surface area of the triangular prism = 174 ft²

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Given the set 5, 8, 8, 8, 8, 9, 9, 9,  10, & 10. Calculate the mean which is the average of a given data set.

[tex]\bold{Mean}=\frac{Sum \ of \ all \ Data \ Points }{The \ Amount \ of \ Data \ Points \ you \ have}[/tex]

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

[tex]\bold{Mean}=\frac{5+8+8+8+8+9+9+10+10 }{10}[/tex]

[tex]\Longrightarrow \bold{Mean}=\frac{75 }{10}[/tex]

[tex]\Longrightarrow \bold{Mean}=7.5[/tex]

[tex]\Longrightarrow \boxed{\bold{Mean} \approx 8} \therefore Sol.[/tex]

The area of the circles are calculated below.

The area of a circle is given by the formula:

A = πr²

Where r is the radius of the circle

No. 1

r = 0.7 in

A = π * 0.7² = 0.49π in²

No. 2

r = 1.0/2 = 0.5 in

A = π * 0.5² = 0.25π in²

No. 3

r = 1.6/2 = 0.8 in

A = π * 0.8² = 0.64π in²

No. 4

r = 0.4/2 = 0.2 in

A = π * 0.2² = 0.04π in²

No. 5

r = 0.3 yd

A = π * 0.3² = 0.09π yd²

No. 6

r = 0.9 ft

A = π * 0.9² = 0.81π ft²

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The values of the table which are in ordered pairs of the form (x,y) are

(-4, 15); (0, 7); (3,1); (5, -3); (8, -9). The correct answer is option B.

Choice A sets the values of y with the values of x rather than blending the values of x with the values of y. For case, the primary ordered pair in alternative A is (15, -4), which suggests that the esteem of x is 15 and the value of y is -4, which is the inverse of what is given within the table.

Alternative C too sets the values of x and y inaccurately. For illustration, the primarily requested combine in alternative C is (-4, 0), which suggests that the esteem of x is -4 and the value of y is 0, which isn't adjusted concurring to the table.

Choice D moreover sets the values of x and y within the off-base arrangement. For the case, the primarily ordered combine in choice D is (15, 7), which implies that the value of x is 15 and the esteem of y is 7, which isn't reliable with the table.

Alternative B is the right reply since it sets each esteem of x with its comparing esteem of y. For case, the primary requested match in choice B is (-4, 15), which implies that the esteem of x is -4 and the esteem of y is 15, which is steady with the primary push of the table. 

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When applying the multiplication and division rules for exponents, it is important to remember that the rules apply only when the bases of the exponents are equivalent. So, correct option is C.

In other words, the bases must be the same number or variable. The multiplication rule for exponents states that when you multiply two numbers with the same base, you can add their exponents. For example, if you have 2² × 2³, you can simplify it to 2²⁺³ = 2⁵ = 32. However, if the bases are different, you cannot apply this rule.

The division rule for exponents states that when you divide two numbers with the same base, you can subtract their exponents. For example, if you have 5⁴ ÷ 5², you can simplify it to 5⁴⁻² = 5² = 25. Again, this rule can only be applied when the bases are the same.

In summary, when applying the multiplication and division rules for exponents, you must ensure that the bases are equivalent. If the bases are different, the rules cannot be applied.

Therefore, option c is the correct answer.

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The number of different subsets of $\{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12\}$  is 13.

We are given that;

Subset = $\{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12\}$

Now,

To apply the principle of inclusion-exclusion, we need to find the number of elements in each set and each intersection of sets. We have:

∣A∣=∣B∣=∣C∣=6

∣A∩B∣=∣A∩C∣=∣B∩C∣=2

∣A∩B∩C∣=1

Using the principle of inclusion-exclusion, we get:

∣A∪B∪C∣=∣A∣+∣B∣+∣C∣−∣A∩B∣−∣A∩C∣−∣B∩C∣+∣A∩B∩C∣

Plugging in the values we have found above, we get:

∣A∪B∪C∣=6+6+6−2−2−2+1=13

Therefore, by the subset the answer will be 13.

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For the first series, n² (n=1 to ∞), it is a divergent series since it is a sum of squares of positive integers, which will grow without bound.

Now, let's analyze the series:

vn (n² + n + 3) (n=1 to ∞).

As n becomes larger, the dominant term is n². Since the original series n² is divergent, the series vn (n² + n + 3) will also be divergent.

For the second series:

3n (n=1 to ∞), it is a divergent series as it is a sum of positive integer multiples of 3, which will also grow without bound.

To analyze the series T + Vn (3n + n²) (n=1 to ∞), the dominant term as n becomes larger is n². Since the series 3n is divergent, it doesn't provide enough information to determine the convergence or divergence of the series T + Vn (3n + n²). Further analysis would be needed to make that determination.

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The Ratio Test shows that the series [tex]\sum_{n=0}^{\infty} \frac{2^n}{n!}[/tex] converges absolutely.

We must determine the maximum ratio of successive terms before we can apply the ratio test to the series 2n/n!

[tex]\lim_{n \to \infty} \left| \frac{2(n+1)/(n+1)!}{2n/n!} \right|[/tex]

Simplifying the expression, we get:

[tex]\lim_{n \to \infty} \left| \frac{2(n+1)/(n+1)(n!)}{2n/n!} \right|[/tex]

[tex]\lim_{n \to \infty} \left| \frac{2(n+1)}{(n+1)} \right| \\[/tex]

[tex]\lim_{n \to \infty} 2 \\[/tex]

The Ratio Test informs us that the series absolutely converges because the limit is a positive finite constant (2). The Ratio Test, which compares the growth rates of successive terms, is an effective method for examining the convergence of series with positive terms. The series absolutely converges if the limit of the ratio of consecutive terms is smaller than 1, and it diverges if it is bigger than 1.

The Ratio Test is inconclusive if the limit is exactly 1 or if it does not exist, in which case we may need to use additional convergence tests. In this instance, the Ratio Test informs us that the series definitely converges, hence we do not need to take into account any other tests.

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The probability of selecting an even number card is: 50%

The number of the cards are given as:

4, 5, 6 and 7

Now, an even number are defined as any number that can be exactly divided by 2. Even numbers always end up with the last digit as 0, 2, 4, 6 or 8. Some examples of even numbers are 2, 4, 6, 8, 10, 12, 14, 16.

A number which is not divisible by “2” is called an odd number. An odd number always ends in 1, 3, 5, 7, or 9. Examples of odd numbers: 51 , − 543 , 8765 , − 97 , 9 , etc.

Thus, we have 4 cards and the even number are 2. Thus:

P(even) = 2/4 = 0.5

= 50%

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Answer:

To draw a right triangle with a tangent ratio of 3/2 for one of the acute angles, we can choose any angle whose tangent is 3/2. Let's choose the angle θ.

We know that:

tangent ratio = opposite side / adjacent side

So, we can assign any value we want to the adjacent side, and then calculate the opposite side. Let's say the adjacent side is 2 units. Then, the opposite side would be:

opposite side = tangent ratio * adjacent side = (3/2) * 2 = 3

So, the sides of the triangle are:

adjacent side = 2

opposite side = 3

hypotenuse = √(2^2 + 3^2) = √13

We can now use trigonometry to find the measure of the other acute angle. The tangent of an angle is equal to the opposite side over the adjacent side, so we have:

tan(θ) = opposite side / adjacent side

tan(θ) = 3/2

Taking the inverse tangent of both sides, we get:

θ = tan^(-1)(3/2)

θ ≈ 56.3°

So, the other acute angle of the right triangle is approximately 56.3 degrees.

From the two column proof below we have been able to show that:

WZ bisects ∠YWX

A two-column proof uses a table to present a logical argument and assigns each column to do one job, and then the two columns work in lock-step to take a reader from premise to conclusion.

The two column proof here is:

Statement 1: WY ≅ WX, zy ≅ zx

Reason 1: Given

Statement 2: ∠WYX ≅ ∠WXY, ∠3 ≅ ∠4

Reason 2: Base angles of Isosceles triangles are congruent

Statement 3: m∠WYX = m∠WXY

Reason 3: Measures of congruent angles are equal

Statement 4: m∠WYX = m∠6 + m∠3: m∠WXY = m∠5 + m∠4

Reason 4: Angle Addition Postulate

Statement 5: m∠6 + m∠3 = m∠5 + m∠4

Reason 5: Substitution

Statement 6: m∠6 + m∠3 = m∠5 + m∠3

Reason 6: Substitution

Statement 7: m∠6 = m∠5

Reason 7: Subtraction Property of equality

Statement 8: ΔWYZ ≅ ΔWXZ

Reason 8: SAS

Statement 9: ∠YWZ ≅ ∠XWZ

Reason 9: Corresponding parts of congruent triangles are congruent.

Statement 10: WZ bisects ∠YWX

Reason 10: Definition of angle bisector

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The probability of a standard normal variable being less than -2.65 is 0.0040. Therefore, P(x < 979) = 0.0040.

To solve this problem, we use the central limit theorem since we have a large enough sample size.

a) Probability that a single randomly selected value is less than 979 dollars

To find the probability that a single randomly selected value is less than 979 dollars, we standardize the value and use the standard normal distribution:

z = (979 - 1046) / 206 = -0.3233

Using a standard normal distribution table or calculator, we find that the probability of a standard normal variable being less than -0.3233 is 0.3736. Therefore, P(X < 979) = 0.3736.

b) Probability that a sample of size n = 66 is randomly selected with a mean less than 979 dollars

To find the probability that a sample of size n = 66 is randomly selected with a mean less than 979 dollars, we use the central limit theorem.

The mean of the sampling distribution of the sample means is the same as the population mean, which is 1046 dollars. The standard deviation of the sampling distribution of the sample means is the standard error, which is:

SE = σ / sqrt(n) = 206 / sqrt(66) = 25.23

To standardize the sample mean, we use the formula:

z = (x - μ) / SE = (979 - 1046) / 25.23 = -2.65

Using a standard normal distribution table or calculator, we find that the probability of a standard normal variable being less than -2.65 is 0.0040. Therefore, P(x < 979) = 0.0040.

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The first function is the correct option, it is:

f(x) = (x² - 36)/(x - 6)

We know that the domain of the function f(x) is (-∞, ∞).

So our function has no jumps, meaning that the denominator never is equal to zero.

So any of the options where the denominator can't be removed can be igonerd.

the first function is:

f(x) = (x² - 36)/(x - 6)

You can rewrite the numerator as:

(x - 6)*(x + 6)

REplacing that you will get.

f(x) = [(x - 6)*(x + 6)]/(x -6) = x + 6

So the denominator was removed, then the domain is (-∞, ∞).

This is the correct option.

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