find the coordinate vector of a = 4 5 6 7 with respect to the basis = e22, e21, e12, e11 of m22.

175 texts would need to be sent for the charges of the two companies to be equal.

Let's represent the number of texts as 'x'.

For the first company, the total charge would be $13 + $0.12x (since they charge 12 cents per text).

For the second company, the total charge would be $20 + $0.08x (since they charge 8 cents per text).

To find the number of texts needed for the charges to be equal, we can set up the equation:

$13 + $0.12x = $20 + $0.08x

$0.12x - $0.08x = $20 - $13

$0.04x = $7

x = $7 / $0.04

x = 175

Therefore, 175 texts would need to be sent for the charges of the two companies to be equal.

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Answer: 28

Step-by-step explanation: Add all together and add 5 to make the 28

The volume of the cone is approximately 84.78 cubic inches.To find the volume of a cone with a diameter of 6 inches and a slant height of 9 inches, we need to first find the radius of the cone. The diameter is 6 inches, so the radius is half of that, which is 3 inches.

Next, we can use the Pythagorean theorem to find the height of the cone. The slant height is 9 inches, which is the hypotenuse of a right triangle with legs equal to the radius and the height of the cone. We can write the following equation:

r^2 + h^2 = l^2

where r is the radius, h is the height, and l is the slant height. Substituting the given values, we get:

3^2 + h^2 = 9^2

9 + h^2 = 81

h^2 = 72

h = sqrt(72)

h ≈ 8.485 inches

Now that we have the radius and height, we can use the formula for the volume of a cone:

V = (1/3)πr^2h

Substituting the values we found, we get:

V = (1/3)π(3^2)(8.485)V ≈ 84.78 cubic inches.

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Answer:

r - 1  + (-1) / (r+5)

Step-by-step explanation:

1) divide r² by r to get r.  write this on top.

2) multiply this r by r + 5 to get r² + 5r

3) subtract ( r² + 5r) from  r² + 4r. this gives answer of -r

4) bring down the -6 from dividend

5) divide -r by r to get -1

6) multiply -1 by r + 5. this gives answer -r - 5

7) subtract (-r - 5) from -r - 6. this gives answer of -1

8) now we cannot divide -1 by r. that means -1 is our remainder.

9) you can confirm this by multiplying out (r + 5) (r - 1) = r² + 4r - 5.

this is 1 more than our original divisor (that was -6)

(a) The resulting angular speed ωf of the guard and merry-go-round can be calculated using the principle of conservation of angular momentum.

The new angular speed ωf can be expressed as ωf = ωi/(1 + 4m/9M), where M is the mass of the merry-go-round. Thus, the resulting angular speed is inversely proportional to the sum of the rotational inertia of the system and the square of the distance of the guard from the center.

As the guard moves closer to the center, the rotational inertia of the system decreases, resulting in an increase in angular speed.

(b) To find the work done by the security guard on the merry-go-round, we use the work-energy principle.

The work done is equal to the change in kinetic energy of the system, which is given by (1/2)Iω^2, where I is the rotational inertia and ω is the angular speed. Initially, the kinetic energy of the system is (1/2)Iωi^2. After the guard moves, the new kinetic energy of the system is (1/2)I'ωf^2, where I' is the new rotational inertia of the system and ωf is the new angular speed.

Thus, the work done by the guard is given by W = (1/2)I'ωf^2 - (1/2)Iωi^2.

Substituting the values of I', ωf, and simplifying the expression,

we get W = (2mR^2/9)[(ωi^2/2)(1 - 1/(1 + 4m/9M)^2)].

Therefore, the work done by the security guard is proportional to the square of the initial angular speed of the merry-go-round and inversely proportional to the sum of the rotational inertia of the system and the square of the distance of the guard from the center. As the guard moves closer to the center, the work done by him decreases.

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There are 360 ways for a four-letter words that can be formed using the letters of the word finite. So, correct option is B.

To find the number of four-letter words that can be formed using the letters of the word "finite," we can use the permutation formula, which is:

nPr = n! / (n-r)!

where n is the total number of items to choose from, and r is the number of items to choose. In this case, we have 6 letters to choose from (n=6), and we want to choose 4 letters (r=4).

Therefore, the number of four-letter words that can be formed is:

6P₄ = 6! / (6-4)!

= 6! / 2!

= (6 x 5 x 4 x 3 x 2 x 1) / (2 x 1)

= 720 / 2

= 360

Therefore, the answer is 360, which corresponds to option B.

In summary, there are 360 four-letter words that can be formed using the letters of the word "finite," by using the permutation formula to calculate the number of possible arrangements of the 6 letters taken 4 at a time.

So, correct option is B.

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Answer:

x = 5, y = 6

Step-by-step explanation:

x + 5y = 35, поэтому 3x + 15y = 105 (уравнение 1)

Кроме того, 3x + 2y = 27 (уравнение 2)

Мы должны найти y, вычитая второе уравнение из первого

Получаем, 13 y = 78, значит y = 6

А теперь подставьте y в любое уравнение, чтобы найти x = 5

If Russell runs at a constant speed, then we can use the formula. If we know his speed and the time he runs for, we can calculate the distance he travels.

distance = speed x time

If we know his speed and the time he runs for, we can calculate the distance he travels.

However, since you did not provide any information about Russell's speed, we cannot give a specific answer to the question.

If you provide the speed, we can use the formula above to calculate the distance he travels in 2.8 seconds. Alternatively, if you provide any additional information about the problem, such as the distance he has already traveled or the acceleration he experiences, we may be able to use that information to calculate the distance he travels in 2.8 seconds.

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The statement that if we reject the null hypothesis [tex]H_0: μ=50[/tex], at the 0.05 significance level, then the 95% confidence interval for μ will contain the value 50 is false statement.

The null hypothesis states that there is no relationship between the two variables which are studied. It is denoted by H₀. If the null hypothesis is rejected in hypothesis testing the alternative hypothesis is true.

We have, null hypothesis defined as [tex]H_0: μ= 50[/tex]

then alternative hypothesis is defined as [tex]H_a: μ ≠ 50[/tex].

Level of significance = 0.05

Now, from above discussion, if we reject the null hypothesis of mean is 50 then we can conclude that the population mean value is other than 50. That is the 95% confidence interval for μ does not contain the value 50. Hence, it is a false statement.

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Complete question:

True/ false : if we reject the null hypothesis [tex]H_0: μ=50[/tex] at the 0.05 significance level, then the 95onfidence interval for μ will contain the value 50.

[tex]\textit{area of a trapezoid}\\\\ A=\cfrac{h(a+b)}{2}~~ \begin{cases} h~~=height\\ a,b=\stackrel{parallel~sides}{bases~\hfill }\\[-0.5em] \hrulefill\\ a=12\\ b=6\\ h=9 \end{cases}\implies A=\cfrac{9(12+6)}{2}\implies A=81~ft^2[/tex]

Answer:

The answer is: (B)

The solution is (4, 200). This means that it will cost me $200 to go to either gym 4 times.

the equations given to you were:

(C = 100 + 25x) and (C = 50x)

well, if you plug in 200 for C and 4 for x you get these equations,

200 = 100 + 25(4), and 200 = 50(x)

I solved both step-by-step below.

1. C = 100 + 25x plug in points

200 = 100 + 25(4) solve the parenthesis's

200 = 100 + 100 combine like terms

200 = 200 both sides are equal

2. C = 50x plug in points

200 = 50(4) solve the parenthesis's

200 = 200 both sides are equal

The exact formula for the probability of a node with degree k being attached from the new node is given by the following expression:

pk = (k ⋅ m) / Σj(j ⋅ m)

where m is the average degree of the network and Σj(j ⋅ m) is the sum of the product of the degree and the number of nodes with that degree.

To show that if pk = 1, then Pr{a node with degree k being attached from a new node} = mpk, we can use the definition of conditional probability:

Pr{a node with degree k being attached from a new node} = Pr{new node attaches to a node with degree k} × Pr{a node with degree k is selected}

From the definition of the probability pk, we know that Pr{a node with degree k is selected} = pk. We also know that the probability that a new node attaches to a node with degree k is proportional to the number of nodes with degree k. Let nk be the number of nodes with degree k, then the probability of a new node attaching to a node with degree k is nk / n, where n is the total number of nodes in the network.

Since the network is assumed to be large, we can assume that the number of nodes with degree k is proportional to pk. That is, nk = mpk. Then, the probability of a new node attaching to a node with degree k is:

Pr{new node attaches to a node with degree k} = nk / n = mpk / n

Substituting these values in the expression for Pr{a node with degree k being attached from a new node}, we get:

Pr{a node with degree k being attached from a new node} = (mpk / n) × pk = mpk

Therefore, if pk = 1, then Pr{a node with degree k being attached from a new node} = mpk.

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The sampling distribution for the sample mean can be approximated by a normal distribution with a mean of $52,500 and a standard deviation of $651.89, based on the Central Limit Theorem. The shape of the sampling distribution is approximately normal.

The probability of obtaining a sample mean greater than $55,000 can be calculated using a z-score and the standard normal distribution. The z-score is (55,000 - 52,500) / 651.89 = 3.83. Using a standard normal table or calculator, we find that the probability of obtaining a z-score greater than 3.83 is very low, approximately 0.0001.

If a random sample of size 60 had a mean of $55,000, it would be considered unusual given that it is more than 3 standard deviations above the mean of the sampling distribution. This suggests that the true population mean may be higher than $52,500. However, it is important to note that the sample may not be representative of all two-year institutions in the United States, so further investigation would be needed to draw definitive conclusions.

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b. Length of commercial will be the independent variable and memory will be the dependent variable.

The independent variable in a regression analysis is the variable that is hypothesized to influence or explain the dependent variable. In this case, the executive is interested in knowing whether the length of a commercial influences people's memory of the product advertised. Therefore, the length of the commercial is the independent variable and memory is the dependent variable.

The purpose of regression analysis is to estimate the relationship between the independent and dependent variables and to use this relationship to make predictions about the dependent variable. In this case, the regression analysis would allow the TV executive to estimate how much the length of the commercial affects people's memory of the product. The executive could then use this information to make decisions about how long the commercials should be in order to maximize their impact on viewers. For example, if the analysis suggests that longer commercials lead to better memory of the product, the executive might decide to invest in longer commercials to increase the likelihood that viewers will remember the product and eventually buy it.

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-412 degrees is equivalent to -0.907571 radians.

To convert -412 degrees to radians, we need to use the formula:

[tex]radians = (\pi/180) \times degrees[/tex]

where pi is the mathematical constant pi (approximately 3.14159) and degrees is the angle in degrees that we want to convert.

First, we need to handle the negative sign.

A negative angle means that we are rotating in the opposite direction, which is equivalent to adding 360 degrees to the angle.

So, we can add 360 to -412 to get:

-412 + 360 = -52

Now, we can use the formula to convert -52 degrees to radians:

[tex]radians = (\pi/180) \times (-52)[/tex]

radians = -0.907571

Therefore, -412 degrees is equivalent to -0.907571 radians.

To understand this conversion in more detail, it is important to understand what degrees and radians are.

Degrees are a unit of measurement for angles, where a full circle is divided into 360 equal parts. Radians are another unit of measurement for angles, where a full circle is divided into [tex]2\pi[/tex] (or approximately 6.28) equal parts.

One radian is the angle subtended at the center of a circle by an arc that is equal in length to the radius of the circle.

Converting between degrees and radians is important in many areas of mathematics and physics, particularly when dealing with trigonometric functions such as sine, cosine, and tangent.

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The approximate mass of air in a typical room with dimensions 5.7m × 3.9m × 3.0m is about 80.14 kg.

To calculate the approximate mass of air in a typical room with dimensions 5.7m × 3.9m × 3.0m, we need to find the volume of the room first. The volume of the room is given by:

Volume = length x width x height = 5.7m x 3.9m x 3.0m = 66.78 cubic meters

Assuming that the air in the room has a density of approximately 1.2 [tex]kg/m^3[/tex], we can use the formula:

Mass = Density x Volume

where density is in kg/m^3 and volume is in cubic meters.

Substituting the values, we get:

Mass = [tex]1.2 kg/m^3 x 66.78[/tex] cubic meters

Mass ≈ 80.14 kg

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The volume of the solid is (7π/5) cubic units.

We have,

To find the volume of the solid obtained by rotating the region under the curve y = x³ about the line y = -1 over the interval [0,1], we can use the method of cylindrical shells.

Consider an infinitesimally thin vertical strip of width dx at a distance x from the y-axis.

The height of this strip is given by the difference between the curve

y = x³ and the line y = -1.

The height of the strip is (x³ - (-1)) = (x³ + 1).

The circumference of the cylindrical shell is given by 2πx, and the thickness of the shell is dx.

Hence, the volume of the shell is given by dV = 2πx (x³ + 1) dx.

To find the total volume, we integrate this expression over the interval [0,1]:

V = ∫ [0,1] 2πx (x³ + 1) dx.

To find the volume, we evaluate the integral:

V = ∫[0,1] 2πx (x³ + 1) dx

Let's integrate term by term:

V = 2π ∫[0,1] ([tex]x^4[/tex] + x) dx

Integrating each term separately:

V = 2π [(1/5)[tex]x^5[/tex] + (1/2)x²} evaluated from 0 to 1

Plugging in the limits:

V = 2π [(1/5)([tex]1^5[/tex]) + (1/2)(1²)] - [(1/5)([tex]0^5[/tex]) + (1/2)(0²)]

V = 2π [(1/5) + (1/2)] - [0 + 0]

V = 2π (7/10)

V = (14π/10)

Simplifying the fraction:

V = (7π/5)

Therefore,

The volume of the solid is (7π/5) cubic units.

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(a) a = {6, {6}, (6)2}, b = {6, {6}, {{6}}} .  Neither a nor b is a proper subset of the other because they both have elements that are not in the other set.


we need to compare the elements of set a and set b.
First, is a ⊆ b?
Yes, a is a subset of b because all the elements in set a are also in set b.
Second, is b ⊆ a?
No, b is not a subset of a because b has an extra element {{6}} that is not in set a.
Finally, is either a or b a proper subset of the other?
No, neither set is a proper subset of the other because they have the same number of elements and only differ in the way the elements are arranged.

a = {6, {6}, (6)²}, b = {6, {6}, {{6}}}
1. Is a ⊆ b?
No, because (6)² = 36 is an element in a but not in b.
2. Is b ⊆ a?
No, because {{6}} is an element in b but not in a.
3. Is either a or b a proper subset of the other?

Remember to analyze the elements of the sets and compare them to determine if one is a subset or proper subset of the other.

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The temperature 38 degrees below zero as an integer is -38.

We can see here that according to the partial W-2 form, the money that was paid in FICA taxes is: B. $1789.87.

Governments impose taxes as obligatory financial charges or levies on citizens, businesses, and other organizations to pay for public expenses and fund government operations.

FICA taxes are comprised of Social Security and Medicare taxes.

The Social Security tax rate is 6.2% and the Medicare tax rate is 1.45%. The total FICA tax rate is 7.65%.

The breakdown of the FICA taxes paid:

Social Security tax: $1430.20

Medicare tax: $359.67

Total FICA taxes: $1789.87

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To find the equations of the tangents to the curve x = 9t^2+6, y = 6t^3+3 that pass through the point (15, 9), we first need to find the points where the tangents touch the curve.

We do this by differentiating both x and y with respect to t and finding the value of t when the slope of the tangent line is equal to the slope of the line passing through (15,9).

Differentiating x and y with respect to t, we get dx/dt = 18t and dy/dt = 18t^2. The slope of the tangent line at a point (x,y) on the curve is given by dy/dx = (dy/dt)/(dx/dt) = t/3.

To find the values of t where the tangent line passes through (15,9), we solve the equation (y-9)/(x-15) = t/3 for t. Substituting x = 9t^2+6 and y = 6t^3+3, we get the quadratic equation 2t^2-3t+1 = 0, which factors as (t-1)(2t-1) = 0. Therefore, the two values of t are t = 1/2 and t = 1.

Now, we find the slopes of the tangent lines at t = 1/2 and t = 1 by substituting these values into the expression for dy/dx. We get slopes of -1/6 and 1/3, respectively. Using the point-slope form of the equation of a line, we can write the equations of the tangent lines as y-9 = (-1/6)(x-15) and y-9 = (1/3)(x-15).

Simplifying, we get y = (-1/6)x + 63/2 and y = (1/3)x + 3/2. Therefore, the equations of the tangents to the curve that pass through the point (15,9) are y = (-1/6)x + 63/2 and y = (1/3)x + 3/2.

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The outcome of the survey would be biased if the plan for selecting the 50 members to participate in the survey is not representative of the entire membership of 250 people. Several scenarios could introduce bias into the survey:

Convenience Sampling: If the surveyors simply approach the first 50 members they encounter at the club, it would introduce bias because it assumes all members have an equal chance of being selected. However, this method may inadvertently exclude certain groups, such as those who frequently play during specific time slots.

Self-Selection Bias: If the survey is conducted on a voluntary basis, where members can choose whether to participate, it can introduce self-selection bias. Members who have extreme opinions, either highly satisfied or dissatisfied, may be more likely to participate, leading to an inaccurate representation of the overall satisfaction levels.

Demographic Bias: If the surveyors do not consider the demographic diversity within the club while selecting participants, it may result in biased outcomes. For example, if the survey predominantly includes only male or only female members, it may not accurately represent the satisfaction levels of both genders.

To avoid bias, it is crucial to use a random sampling method that ensures each member has an equal chance of being selected for the survey. This way, the selected sample will more accurately reflect the overall satisfaction of the entire membership.

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Width of door = 3ft

width of window = 9 ft

length of bench = 12 ft

Given that,

1 unit = 3 feet

Now from figure,

Width of door = 1 unit

We know that,

A measurement unit is a standard quality used to express a physical quantity. Also it refers to the comparison between the unknown quantity with the known quantity.

In feet Width of door  = 3 feet

Width of window = 3 units

Therefore,

In feet width of window  = 3x3 = 9 feet

length of bench = 4 units

Therefore,

In feet length of bench  = 3x4 = 12 feet

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The complete question is:

in Arvins scale drawing of his garden shed, 1 unit = 3 feet. find the actual measurements in ft:

Width of door

width of window

length of bench

Let x be the length of the candle before it was lit. The candle burns at a constant rate of 0.9 inches per hour, so after burning for 3.5 hours, the length of the candle remaining is 9.85 - 0.9(3.5) = 6.25 inches. We can set up the equation:

x - 0.9(3.5) = 6.25

Simplifying this equation, we get:

x = 9.95 inches

Therefore, the length of the candle before it was lit was 9.95 inches.

In this problem, we used the fact that the rate at which the candle burns is constant, and we used this information to calculate how much of the candle had burned after 3.5 hours. From there, we were able to set up an equation to find the length of the candle before it was lit. This problem illustrates how to use algebraic equations to solve real-world problems involving rates and quantities.

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The first three nonzero terms of the Taylor series are:

f(x) = 6(x-5π) + 0(x-5π)² + ... = 6x - 30π

What is the Taylor series?

A Taylor series is a representation of a function as an infinite sum of terms that are calculated from the values of the function's derivatives at a single point. The series provides a way to approximate the function in the neighborhood of that point.

We start by finding the nth derivative of f(x) at x = 5π for any positive integer n:

f(x) = 6 tan x

f'(x) = 6 sec² x

f''(x) = 12 sec² x tan x

f'''(x) = 12 sec⁴x + 24 sec² x tan² x

We can see a pattern emerging in the derivatives, so we can guess that the nth derivative is:

f^(n)(x) = P(n) secⁿx + Q(n) sec⁽ⁿ⁻²⁾x tan² x

where P(n) and Q(n) are polynomials in n.

Now, we can use the definition of the Taylor series:

f(x) = Σ0,∞(x-c)ⁿ

to find the first three nonzero terms of the Taylor series for f(x) centered at c = 5π.

Plugging in the nth derivative at x = 5π:

fⁿ(5π) = P(n) secⁿ 5π + Q(n) sec⁽ⁿ⁻²⁾ 5π tan² 5π

We can simplify this using the fact that sec(5π) = -1 and tan(5π) = 0:

fⁿ(5π) = (-1)ⁿ P(n) + Q(n) (-1)⁽ⁿ⁻¹⁾

Now, we can write out the first few terms of the Taylor series:

f(x) = f(5π) + f'(5π)(x-5π) + (f''(5π)/2!)(x-5π)² + ...

f(5π) = 6 tan(5π) = 0

f'(5π) = 6 sec²(5π) = 6

f''(5π) = 12 sec²(5π) tan(5π) = 0

hence, the first three nonzero terms of the Taylor series are:

f(x) = 6(x-5π) + 0(x-5π)² + ... = 6x - 30π

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By creating equation, we can solve for x to get the following values:

8. x = 9;      9. x = 9

In order to solve for x in each problem, note that the segments are equal to each other, therefore, we would create an equation that will enable us solve for x.

8. 2x + 12 = 5x - 15

Combine like terms

2x - 5x = -12 - 15

-3x = -27

Divide both sides by -3:

-3x/-3 = -27/-3

x = 9

9. 8x - 63 = 4x - 27

8x - 4x = 63 - 27

4x = 36

4x/4 = 36/4 [division property]

x = 9

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The correct explicit formula for the nth term of the arithmetic sequence is given as follows:

[tex]a_n = 78 - 12.5(n - 1)[/tex]

An arithmetic sequence is a sequence of values in which the difference between consecutive terms is constant and is called common difference d.

The nth term of an arithmetic sequence is given by the explicit formula presented as follows:

[tex]a_n = a_1 + (n - 1)d[/tex]

The first term of the sequence in this problem is given as follows:

[tex]a_1 = 78[/tex]

Each term is the previous term subtracted by 12.5, hence the common difference is given as follows:

d = -12.5.

Hence the formula for the nth term is given as follows:

[tex]a_n = 78 - 12.5(n - 1)[/tex]

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The equation of the tangent to the curve at the given point. x = 7 sin(t), y = t2 t, (0, 0) is y = 0, To find the equation of the tangent to the curve at the given point (0, 0), we first need to find the derivative of x and y with respect to t, and then find the slope of the tangent at the given point.

Given: x = 7sin(t), y = t^2

Find dx/dt and dy/dt:
dx/dt = 7cos(t)
dy/dt = 2t

Now, find the slope of the tangent at the point (0, 0) by dividing dy/dt by dx/dt:

Slope = (dy/dt) / (dx/dt) = (2t) / (7cos(t))

At t = 0, the slope is:
Slope = (2*0) / (7cos(0)) = 0 / 7 = 0

Now we use the point-slope form of the equation to find the equation of the tangent line:

y - y1 = slope * (x - x1)

Since the point is (0, 0) and the slope is 0, the equation becomes:

y - 0 = 0 * (x - 0)

Simplifying, we get the equation of the tangent line as:

y = 0

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The likelihood you draw at least one blue card out of the three draws if you're drawing with a replacement is 0.784.

Given that You are randomly drawing 3 cards from a deck that holds 12 red cards and 8 blue cards.

Further, the probability of getting all three red cards is,

Probability = [ (Number of red cards)/(Total number of cards) ] ³

                  = (12/20)³

                  = (0.6)³

                  = 0.216

Since you need the probability of getting at least one blue card, therefore, the probability of getting at least one blue card can be found by deducting the probability of getting no card blue from the total probability.

Thus, the likelihood you draw at least one blue card if you're drawing with a replacement is,

P(X≥1) = 1 - P(x=0)

          = 1 - 0.216

          = 0.784

Hence, the probability is 0.784.

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[tex]\begin{array}{|c|ll} \cline{1-1} \textit{\textit{\LARGE a}\% of \textit{\LARGE b}}\\ \cline{1-1} \\ \left( \cfrac{\textit{\LARGE a}}{100} \right)\cdot \textit{\LARGE b} \\\\ \cline{1-1} \end{array}~\hspace{5em}\stackrel{\textit{4\% of 6000}}{\left( \cfrac{4}{100} \right)6000}\implies 240[/tex]