A continuous random variable X has a pdf of the form: f(x) = (265/652) x^3, for 0.90 < X < 1.80. Calculate the standard deviation (sigma) of X. Your answer: 0.138 0.715 O 0.340 0.828 O 0.417 O 0.232 O 0.172 O 0.532 O 0.258

In a case whereby A mathematics student decides to use an approximation of π of 355/113 his percentage error in using this value,  can  be expressed as

Percent error (percentage error)  can be described as the difference that can be established between  experimental  as well as theoretical value,  which is been divided by theoretical value then find the multiplication by  100

The error can be calculad as (355/113 -  π) /  π

=8.5*10^-5

The percentage error = 8.5*10^-5*100 = 8.5*10^-6

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To prove that a² is algebraic, we need to find a polynomial in F[x] that has a² as a root. Let's start by considering the polynomial with coefficients depending on a's:

p(x) = (x - a²)

If we substitute x = a into this polynomial, we get:

p(a) = (a - a²) = a(1 - a)

Since a is a root of ao + a1x +... + anx^n, we know that:

ao + a1a +... + ana^n = 0

Multiplying both sides by a, we get:

a ao + a1a² +... + ana^{n+1} = 0

Substituting a(1 - a) for a², we get:

a ao + a1(a(1 - a)) +... + an(a(1 - a))^n = 0

Simplifying, we get:

a ao + a1a(1 - a) +... + ana^n(1 - a)^n = 0

Multiplying both sides by (1 - a)^n, we get:

a ao(1 - a)^n + a1a(1 - a)^{n+1} +... + ana^n(1 - a)^{2n} = 0

Now, let's group the terms by even powers of a and odd powers of a:

a^0(1 - a)^n ao + a^2(1 - a)^{n+1} a1 +... + a^{2n}(1 - a)^{2n} an = 0

This is a polynomial in F[x] with a² as a root. Therefore, we have proved that a² is algebraic.

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The expression can be expressed as a simplified power series in 2 on interval I as:
n=0 2^n*t^n [an+2 + 10an+1 + an]

To express the given expression as a simplified power series in 2 on interval I, we need to find the derivatives of y and substitute them into the expression.

First, we find the derivatives of y:

y' = an(nx^(n-1)) = nanx^(n-1)

y" = nan(n-1)x^(n-2)

Substituting y', y", and y into the given expression, we get:

(5 - 4x)(nan(n-1)x^(n-2)) + (2x)(nanx^(n-1)) + 3(anx^n)

= 5nan(n-1)x^n - 4nan(n-1)x^(n+1) + 2nanx^(n+1) + 3anx^n

Now we can express this as a power series in 2 by substituting x = 2t:

= 5nan(n-1)(2t)^n - 4nan(n-1)(2t)^(n+1) + 2nan(2t)^(n+1) + 3an(2t)^n

= 5nan(n-1)2^n*t^n - 8nan(n-1)2^(n+1)t^(n+1) + 2nan2^(n+1)t^(n+1) + 3an2^n*t^n

= 2^n*t^n [5nan(n-1) - 8nan(n-1)2t + 2nan(2t) + 3an]

= 2^n*t^n [an+2 + 10an+1 + an]

Therefore, the given expression can be expressed as a simplified power series in 2 on interval I as:

n=0 2^n*t^n [an+2 + 10an+1 + an]

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Answer:

2(1/2)(4)(5.5) + 2(1/2)(5)(6) + 4(6) =

22 + 30 + 24 = 76 square centimeters

B is correct.

The volume of the whole lime represented by a sphere is given by  12 cubic centimeters.

Volume of the lime in hemispherical shape is equal to

= 6 cubic centimeters

Let us consider 'r' be the radius of the sphere.

Volume of hemisphere = ( 2/3 ) πr³

Volume of a sphere = ( 4 /3) πr³

Relation between volume of hemisphere and volume of a whole lime sphere

Volume of a whole lime sphere = 2 times of volume of hemisphere

⇒Volume of a whole lime sphere =  2 × 6

⇒Volume of a whole lime sphere =  12 cubic centimeters.

Therefore, the volume of the whole lime is equal to  12 cubic centimeters.

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The greatest common factor of the given expression is 2.

The expression can be factored as (5x - 1)(x + 3).

Part A :

Given expression is 10x² + 28x - 6.

Greatest common factor of the expression is the greatest of all the common factors.

It is 2.

Therefore, the greatest common factor is 2.

Part B :

10x² + 28x - 6

5x² + 14x - 3

This can be factored as,

(5x - 1)(x + 3)

Part C :

(5x - 1)(x + 3) = (5x)(x) - (x) + (3)(5x) - 3

                    = 5x² + 14x - 3

Hence the GCF is 2.

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Answer: Y = 45x + 140

Step-by-step explanation:

which equation represents the length of the completed tunnel based on the number of days since tbm was introduced? the answer is y = 45x + 140

The probabilities are given as follows:

a. P(number greater than 10) = 1/6.

b. P(number less than 5) = 1/3.

c. The solid is fair, as each side of the dice has the same probability of coming up.

A probability is calculated as the division of the desired number of outcomes by the total number of outcomes in the context of a problem/experiment.

The total number of outcomes for this problem is given as follows:

12.

2 of the numbers are greater than 10, which are 11 and 12, hence the probability is given as follows:

p = 2/12

p = 1/6.

4 of the numbers, which are 1, 2, 3 and 4, are less than 5, hence the probability is given as follows:

p = 4/12

p = 1/3.

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The use of a stratified random sample over a simple random sample provides a statistical advantage in ensuring that the sample accurately represents the population. Stratified random sampling involves dividing the population into subgroups or strata based on certain characteristics, such as age or income.

This allows for a more representative sample as it ensures that each stratum is represented proportionally in the sample. In contrast, a simple random sample does not take into account any characteristics or strata of the population, which may result in an unrepresentative sample. Therefore, the use of a stratified random sample provides a statistical advantage by reducing the potential for sampling bias and increasing the accuracy of the study's results.
In the context of your study, a statistical advantage of using a stratified random sample over a simple random sample is that it ensures greater representation and accuracy in the results.

In a stratified random sample, the population is first divided into distinct subgroups or strata based on specific characteristics, such as age, gender, or income. Then, a simple random sample is taken from each stratum. This method helps to better represent each subgroup in the sample, which in turn improves the overall accuracy of the results.

On the other hand, a simple random sample involves selecting individuals from the entire population without considering any specific characteristics. This approach may not adequately represent certain subgroups, leading to potential biases and less accurate results. In summary, stratified random sampling provides a statistical advantage over simple random sampling by ensuring a better representation of subgroups, leading to more accurate and reliable results.

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The PM of the circle is 6 in.

Since the diameter of the circle divide the circle into two equal parts. We can say:

PM = MQ

Applying the Intersecting Chord Theorem (When two chords intersect each other inside a circle, the products of their segments are equal). That is:

SM * RM = PM * MQ

SM * RM = PM²

SM = 13 - 4

SM = 9 in

RM = 4 in

Substituting:

SM * RM = PM²

9 * 4 = PM²

PM² = 36

PM = √36

PM = 6 in

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The image of the point after it is rotated 180° about the z-axis is A' = (1, -2, -2)

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

Point A = (-1, 2, 2)

The rule of rotation is given as rotated 180° about the z-axis

Mathematically, this rule can be expressed as

(x, y, z) = (-x, -y, -z)

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

A' = (1, -2, -2)

Hence. the image of the point after the rotation is A' = (1, -2, -2)

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The graph is misleading because the y values do not start from the origin

The graph represents the given parameter where

Examining the lengths of the bars with the values, we can see that

The y values do not start from the origin

This is because difference between the bars do not show the correct representation

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Answer:

1/3+(-2/5) and 1/3+2/5

Step-by-step explanation:

From the principal mathematical induction, the inequality, 2ⁿ > n², where n belongs to integers, is true for all integers greater than four, i.e., n > 4.

We have to prove the inequality 2ⁿ > n², for all integer greater than 4. For this we use mathematical induction method. The principle of mathematical induction is one of method used in mathematics to prove that a statement is true for all natural numbers.

Step 1 : first we consider case first for n= 5 , here 2⁵ = 32 and 5² = 25, so 2⁵ > 5²

Thus it is true for n = 5.

Step 2 : Now suppose it's true for some integer k such that n≤ k, that is 2ᵏ > k²--(1)

Step 3 : Now, we have to prove it's true for n = k + 1. So, 2ᵏ⁺¹ = 2ᵏ. 2

2ᵏ⁺¹ = 2ᵏ.2 > 2k² ( since, 2ᵏ > k² )

> 2k² = k² + k²

> k² + 2k + 1 ( since, k² > 2k + 1 ,k > 3)

> ( k +1)² = k² + 2k + 1

=> 2ᵏ⁺¹ > (k+1)²

So, we proved it for n = k + 1. Hence, this theorem is true for all n.

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Answer:

The method of substitution involves three steps:

Solve one equation for one of the variables.

Substitute (plug-in) this expression into the other equation and solve.

Resubstitute the value into the original equation to find the corresponding variable.

Step-by-step explanation:

The weight of the candle after 5 hours of burning would be about 15.05 ounces.

If the burn rate is believed to be constant, we need to determine the average burn rate for the eight candles as the ratio of weight loss per hour.

Ounces lost over three hours =

0.5+0.6+0.5+0.7+0.7+0.5+0.5+0.6 = 4.6/8 = 0.575

Ounces lost per hour on average =

= 0.19

For 0 hours, the weight of each candle is 16 ounces.

Therefore, the equation can be =

w = 16 - 0.19h.

This model can be used to predict the weight of the candle when h, the number of hours of burning, is 5.

W = 16 - 0.19(5)

W = 16 - 0.95

W = 15.05

Hence the weight of the candle after 5 hours of burning would be about 15.05 ounces.

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The firm's weighted average cost of capital is 15.074%

To calculate the weighted average cost of capital (WACC), we need to follow these steps:

1. Determine the weight of each component of the capital structure (debt, preferred stock, and common stock) by dividing the value of each component by the total capital.
2. Multiply the weight of each component by its respective cost.
3. Sum the weighted costs to obtain the WACC.

Here's the step-by-step calculation:

1. Calculate the weights:
Debt weight = $1,083 / $5,032 = 0.215
Preferred stock weight = $268 / $5,032 = 0.053
Common stock weight = $3,681 / $5,032 = 0.732

2. Calculate the weighted costs:
Weighted cost of debt = 0.215 x 5.5% = 0.011825
Weighted cost of preferred stock = 0.053 x 13.5% = 0.007155
Weighted cost of common stock = 0.732 x 18% = 0.13176

3. Sum the weighted costs to find the WACC:
WACC = 0.011825 + 0.007155 + 0.13176 = 0.15074 or 15.074%

Therefore, we can state that the firm's weighted average cost of capital is 15.074%.

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Answer: Surface Area = 7 m * 8.2 m = 57.4 m2

Step-by-step explanation:

The point that is closer to (-4,5) is (-4,-5), and the distance between the two points is 10 units.

We have a points plotted is closer to (−4, 5).

Using distance formula to calculate the distance between two points:

d =√((x2 - x1)² + (y²- y1)²)

d = √((-4 - (-4))² + (-5 - 5)²)

d = √(0² + (-10)²)

d = √100

d = 10

Thus, the distance between (-4,5) and (-4,-5) is 10 units.

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Answer:

Step-by-step explanation:To determine the line of reflection, we need to find the equation of the line that is equidistant from each vertex of the original triangle and the corresponding vertex of the reflected triangle.

First, let's find the coordinates of the image of each vertex under the reflection. Since F' is given as (2, 2), we can reflect F across the unknown line of reflection to find the image of D and E. The line of reflection must be equidistant from each of these pairs of corresponding points.

To reflect F across a vertical line, the x-coordinate of F' must be the same as that of F but with the opposite sign. The x-coordinate of F is -2, so the x-coordinate of its image F' must be 2. Similarly, the y-coordinate of F' is 2, which means that the line of reflection must pass through the point (2, 2).

To reflect D across the same line, we can draw a perpendicular bisector between D and its image D', which must intersect the line of reflection at a right angle. The midpoint of DD' lies on the line of reflection, and it is equidistant from D and D'. Using the midpoint formula, we find the midpoint of DD' to be ((-3+2)/2, (5+2)/2) = (-0.5, 3.5). Since this point lies on the line of reflection, we can use the point-slope form of a line to find the equation of the line passing through (2, 2) and (-0.5, 3.5):

(y - 2) = m(x - 2) (where m is the slope of the line of reflection)

Simplifying:

y - 2 = m(x - 2)

y = mx - 2m + 2

To find the value of m, we can use the fact that the midpoint of DE lies on the line of reflection as well. The midpoint of DE is ((-3-10)/2, (5+4)/2) = (-6.5, 4.5). Substituting these values into the equation of the line, we get:

4.5 = m(-6.5) - 2m + 2

2.5 = -8.5m

m = -0.294

Therefore, the equation of the line of reflection is:

y = -0.294x + 2.588

This line is not the x-axis, y-axis or the line y=x. Therefore, the line of reflection is neither the x-axis nor the y-axis, and it is not the line y = x.

Answer:

X-axis

Step-by-step explanation:

I am in the middle of taking the quiz and this is the answer I think would be correct!

We have shown that there exists some c in (0, 1) such that f(c) = g(c).

By the intermediate value theorem, since f and g are continuous on [0, 1], and f(0) < g(1), there exists some a in the interval [0, 1] such that f(a) = g(1).

Similarly, since f and g are continuous on [0, 1] and f(1) > g(1), there exists some b in the interval [0, 1] such that f(1) > g(b).

Now, consider the function h(x) = f(x) - g(x). Then h is continuous on [0, 1], and h(0) < 0 and h(1) > 0.

By the intermediate value theorem again, there exists some c in the interval (0, 1) such that h(c) = 0, which means that f(c) - g(c) = 0, or f(c) = g(c). Thus, we have shown that there exists some c in (0, 1) such that f(c) = g(c).

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Answer:

[tex] \frac{2}{3} square \: units[/tex]

The total surface area of the square pyramid is 585 in²

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

The area of a figure is the amount of space it occupies in its two dimensional state.

To get the surface area:

Area of base = 15 in * 15 in = 225 in²

Area of one triangle lateral face = (1/2) * 15 in * 12 in = 90 in²

Area of four triangle lateral face = 4 * 90 in² = 360 in²

Total surface area = 225 in² + 360 in² = 585 in²

The total surface area is 585 in²

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We can check that the probabilities sum to 1:

P(X=2) + P(X=3) + P(X=4) + P(X=5) + P(X=6) + P(X=7) + P(X

The sum X of rolling an 8-sided die and a 6-sided die can take values from 2 to 14.

To find the probability distribution of X, we need to calculate the probability of each possible outcome.

For example, to get a sum of 2, we must roll a 1 on the 8-sided die and a 1 on the 6-sided die. The probability of rolling a 1 on an 8-sided die is 1/8, and the probability of rolling a 1 on a 6-sided die is 1/6. Therefore, the probability of getting a sum of 2 is:

P(X=2) = (1/8) * (1/6) = 1/48

Similarly, we can calculate the probabilities for all possible values of X:

P(X=3) = (1/8) * (2/6) + (2/8) * (1/6) = 1/16

P(X=4) = (1/8) * (3/6) + (2/8) * (2/6) + (3/8) * (1/6) = 1/8

P(X=5) = (1/8) * (4/6) + (2/8) * (3/6) + (3/8) * (2/6) + (4/8) * (1/6) = 5/32

P(X=6) = (1/8) * (5/6) + (2/8) * (4/6) + (3/8) * (3/6) + (4/8) * (2/6) + (5/8) * (1/6) = 11/32

P(X=7) = (1/8) * (6/6) + (2/8) * (5/6) + (3/8) * (4/6) + (4/8) * (3/6) + (5/8) * (2/6) + (6/8) * (1/6) = 21/32

P(X=8) = (2/8) * (6/6) + (3/8) * (5/6) + (4/8) * (4/6) + (5/8) * (3/6) + (6/8) * (2/6) = 25/32

P(X=9) = (3/8) * (6/6) + (4/8) * (5/6) + (5/8) * (4/6) + (6/8) * (3/6) = 19/32

P(X=10) = (4/8) * (6/6) + (5/8) * (5/6) + (6/8) * (4/6) = 13/32

P(X=11) = (5/8) * (6/6) + (6/8) * (5/6) = 11/32

P(X=12) = (6/8) * (6/6) = 3/8

P(X=13) = 0

P(X=14) = 0

We can check that the probabilities sum to 1:

P(X=2) + P(X=3) + P(X=4) + P(X=5) + P(X=6) + P(X=7) + P(X

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Answer:

$83.60

Step-by-step explanation:

22 x $3.80 = $83.60

There are 4 aces and 4 nights in a standard 52-card deck. So, the total number of cards that can be considered as a successful outcome is 8. Therefore, the probability of being dealt an ace or an 8 is 8/52 or 2/13. To find the probability of being dealt an Ace or an 8, follow these steps:

1. Identify the total number of cards in the deck: There are 52 cards in a standard deck.

2. Determine the number of Aces and 8s in the deck: There are 4 Aces and 4 eights, totaling 8 cards (4 Aces + 4 eights).

3. Calculate the probability: Divide the number of desired outcomes (Aces and 8s) by the total number of cards in the deck.

Probability = (Number of Aces and 8s) / (Total number of cards)
Probability = 8 / 52

4. Simplify the fraction: 8/52 can be simplified to 2/13.

So, the probability of being dealt an Ace or an 8 from a standard 52-card deck is 2/13.

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With regard to the clindrical designs, note that is advisable for Kevin to opt for the first design which requires about 108.35 square inches of plastic. The second design requires about 431.97 square so Kevin does not have enough plastic to make the second design.

Here we used the surface area formula for cylinders.

Surface Area = 2πr² + 2πrh
R is the base and h is the height.

For First Design we have

Diameter (d) = 2r = 3

so r = 1.5

So Surface Area = 2π(1.5)² + 2π(1.5) (10)

SA First Cylinder = 108.35

Repeating the same step for the second cylinder we have:

SA 2ndCylinder = 431.97

Thus, the conclusion we have above is the correct one because:

108.35in² <  205in² > 431.97in²

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Answer:

Step-by-step explanation:

I knew this because i got this wright on my assignment

For a decimal number 0.54, the converted fraction from this decimal number is written as [tex]\frac{ 54}{100} [/tex]. After simplification, the required fraction is equals to the [tex]\frac{ 27}{50} [/tex].

A fraction is defined as a part of whole. It is expressed as a quotient, where the numerator is divided by the denominator. To convert a decimal to a fraction, first we place the decimal number over its place value. For example, in 0.4, the 4 is in the tenths place, so we place 4over 10 to create the equivalent fraction, 4/10. We can simplify this fraction. To write the decimal fraction in fraction form of the digits to the right of the decimal period (numerator) and a power of 10 (denominator).

We have a decimal number, 0.54. We convert it in a simplified fraction form. As we see decimal is placed on hundredth place. So, the required fraction is 54 over 100 or we can write [tex]\frac{ 54}{100} [/tex]. Simplify this fraction, dividing the denominator and numentor by 2 then, [tex]\frac{27}{50} [/tex]. Hence, required value is [tex]\frac{27}{50} [/tex].

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