To gather information about the elk population, biologist marked 75 elk. later, they flew over the region and counted 250 elk, of
which 15 were marked. what is the best estimate for the elk population?
es -))
a)
1,200
b)
1,250
c)
1,300
d)
1,350

Answer:

It's ASA, AAS,

Step-by-step explanation:

AAS- If two angles and a non-included side in one triangle are congruent to two angles and the corresponding non-included side in another triangle, then the triangles are congruent.

ASA-The ASA criterion for triangle congruence states that if two triangles have two pairs of congruent angles and the common side of the angles in one triangle is congruent to the corresponding side in the other triangle, then the triangles are congruent.

Step-by-step explanation:

To estimate the difference between 5 1/2 and 3 5/9, we can first round the fractions to the nearest whole number or simpler fractions. In this case, we can round 1/2 to 1/2 and 5/9 to 1/2 as well. Now, we have:

5 1/2 − 3 1/2

Subtracting the whole numbers, we get:

5−3=2

Subtracting the fractions, we get:

1/2 − 1/2 = 0

So, the estimated difference is 2, which falls between 2 and 2 1/2. Therefore, Elise chose option D as the correct answer.

If Jamie spins the spinner 60 times, we can predict 20 red, 10 blue, 20 green, and 10 yellow outcomes

First, calculate the probability of each color by dividing the frequency by 30 spins.

Red: 10/30 = 1/3

Blue: 5/30 = 1/6

Green: 10/30 = 1/3

Yellow: 5/30 = 1/6

Now, predict the frequency of each color if Jamie spins the spinner 60 times.

Red: (1/3) * 60 = 20

Blue: (1/6) * 60 = 10

Green: (1/3) * 60 = 20

Yellow: (1/6) * 60 = 10

So, if Jamie spins the spinner 60 times, we can predict 20 red, 10 blue, 20 green, and 10 yellow outcomes

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The Complete Question:

Jamie spun a spinner with 4 colors - red, blue, green, and yellow - 30 times and recorded the frequency of each result in the table below. Use the table to determine the probability of each color and predict the frequency of each color if Jamie spins the spinner 60 times.

Table:

Red - 10

Blue - 5

Green - 10

Yellow - 5

To find the length of BD in a parallelogram where BA = 5x + 5 and AD = 10x - 20, we use the fact that opposite sides of a parallelogram are equal in length. Therefore, BD = BA = 30.

Since it is a parallelogram, we know that opposite sides are equal. So, BD = BA = 5x + 5. To find the value of x, we can use the fact that AD is also equal to BD. So, we can set the two expressions for BD equal to each other

5x + 5 = 10x - 20

Simplifying and solving for x, we get

5x = 25

x = 5

Now we can substitute x back into the expression for BD to get the final answer

BD = 5x + 5 = 5(5) + 5 = 30

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The height and radius of the cone with maximal volume V and surface area S = 8 are h = (4/(3π^2))^(1/4) and r = (1/(3π^2))^(1/4),

respectively.Explanation: To find the height and radius of the cone with maximal volume and surface area of 8, we need to use the formulas for the surface area and volume of a right-circular cone in terms of r and h. We can then use the method of Lagrange multipliers to find the values of r and h that maximize the volume subject to the constraint that the surface area is equal to 8.Using the formulas for the surface area and volume of a cone, we get:S = πr √(r²+h²)V = 1/3πr²hWe can then set up the Lagrangian function L(r,h,λ) = 1/3πr²h + λ(πr √(r²+h²) - 8), where λ is the Lagrange multiplier.Taking the partial derivatives of L with respect to r, h, and λ and setting them equal to zero, we get:∂L/∂r = 2/3πrh + λ(π√(r²+h²) + r²/√(r²+h²)) = 0∂L/∂h = 1/3πr² + λ(πh/√(r²+h²)) = 0∂L/∂λ = πr √(r²+h²) - 8 = 0Solving these equations, we get:h = (4/(3π^2))^(1/4)r = (1/(3π^2))^(1/4)Therefore, the height and radius of the cone with maximal volume and surface area of 8 are h = (4/(3π^2))^(1/4) and r = (1/(3π^2))^(1/4), respectively.(b) The ratio of height to radius for the cone with minimal surface area S and volume V = 5 is h/r = √2.Explanation: Using the formulas for the surface area and volume of a cone in terms of r and h, we can set up the following optimization problem:Minimize S = πr √(r²+h²)Subject to V = 1/3πr²h = 5Using the method of Lagrange multipliers, we can set up the Lagrangian function L(r,h,λ) = πr √(r²+h²) + λ(1/3πr²h - 5), where λ is the Lagrange multiplier.Taking the partial derivatives of L with respect to r, h, and λ and setting them equal to zero, we get:∂L/∂r = π√(r²+h²) + 2λr/3πh = 0∂L/∂h = πr²h/√(r²+h²) - 5λ/3π = 0∂L/∂λ = 1/3πr²h - 5 = 0Solving these equations, we get:h/r = √2Therefore, the ratio of height to radius for the cone with minimal surface area S and volume V = 5 is h/r = √2.(c) No, a cone with given volume V and maximal surface area does not exist.Explanation: Using the formulas for the surface area and volume of a cone in terms of r and h, we can set up the following optimization problem:Maximize S = πr √(r²+h²)Subject to V = 1/3πr²hUsing the method of Lagrange multipliers, we can set up the Lagrangian function L(r,h,λ) = πr √(r²+h²) + λ(1/3πr²h - V), where λ is the Lagrange multiplier.Taking the partial derivatives of L with respect to r, h, and λ and setting them equal to zero, we get:∂L/∂r = π√(r²+h²) + 2λr/3πh = 0∂L/∂h = πr²h/√(r²+h²) - λ/3πr² = 0∂L/∂λ = 1/3πr²h - V = 0Solving these equations, we get:h = rr³ = 3V/πSubstituting h = r into the surface area formula, we get:S = 2

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The function for the population of Madison t years from now is:[tex]p(t) = 25000 (1.12)^{t}[/tex]

To write a function that gives the population P(t) in Madison t years from now, considering the town has an initial population of 25,000 and an annual increase factor of 1.12, you can use the formula:

[tex]p(t) = P_{0}  (1 + r)^{t}[/tex]

Where:
- P(t) is the population at time t
- P_0 is the initial population (25,000)
- r is the annual increase factor (1.12 - 1 = 0.12)
- t is the number of years

So, the function for the population of Madison t years from now is:
[tex]p(t) = 25000 (1.12)^{t}[/tex]

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The unit rate in chapters per hour is 21/16 hours

Greg read 7/8 hours in 2/3 chapter

The unit rate can be calculated as follows

7/8= 2/3

1= x

cross multiply both sides

2/3x= 7/8

x= 7/8 ÷ 2/3

x= 7/8 × 3/2

x= 21/16

Hence 21/16 chapters is read in one hour

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In a case whereby When finding the Quotient of 8,397 divided 12, Calida first divided 83 by 12, then she will be wrong, because the answer is 699.75.

In maths, a division can be described as the process of splitting a specific amount  which can be spread to equal parts instance of thisd is when we divide a group of 20 members into 4 groups and this can be done using the mathematical sign.

In the case of Calida above, the division can be made as

8,397 divided 12

=8,397 / 12

=699.75

Therefore we can say that the right answer to the querstion is 699.75

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Anissa's statement is correct.

The classification of distance, d, as either an independent or dependent

variable depends on the context in which it is used.

Distance as an independent variable:

In this case, distance, d, is considered an independent variable because it

affects the amount of time someone has traveled.

When we are interested in studying how the distance traveled affects

other variables, such as time or fuel consumption, we treat distance as the

independent variable and manipulate it to observe its impact on the

dependent variables.

For example, if we conduct an experiment to measure the time it takes to

travel a certain distance under different conditions (e.g., different speeds or

modes of transportation), we would vary the distance as the independent

variable while keeping other factors constant.

In this scenario, distance is the independent variable, and time is the

dependent variable.

Distance as a dependent variable:

On the other hand, distance, d, can also be considered a dependent

variable when it is affected by the speed traveled.

In this case, speed becomes the independent variable, and distance is

dependent on the speed at which an object or person travels.

For instance, if we investigate how the speed of a vehicle affects the

distance it can travel within a given time, we would manipulate the speed

as the independent variable and observe the corresponding changes in

distance.

Here, distance is the dependent variable, and speed is the independent

variable.

In summary, Anissa's statement is accurate because distance, d, can be

considered an independent variable when it affects other factors such as

time, and it can also be a dependent variable when it is influenced by

factors like speed.

The designation of distance as independent or dependent depends on the

specific context and the relationship it shares with other variables in the

given situation.

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To solve this problem, we can use something called the law of sines. This is a proportional relationship in which the sine of one angle over the opposite side is equal to the sine of another angle over its opposite side.

sin(a) / a = sin(b) / b = sin(c) / c

To use the law of sines, we will need to figure out the measure of angle C, however.

27 + 132 + C = 180

159 + C = 180

C = 21

Now that we have sides and their opposite angles, we can apply the law of sines.

sin(27) / AC = sin(21) / 26

AC x sin(21) = sin(27) x 26

AC = [ sin(27) x 26 ] / sin(21)

AC = 32.9375

AC (rounded) = 32.9

Answer: AC = 32.9 m

Hope this helps!

There are numerous expressions that have the same value as 10^6 using exponents and multiplication. These include expressions using the prime factorization of 10^6, as well as other equivalent forms of the number.

Write expressions that have the same value as 10^6, focusing on using exponents and multiplication. Here are a few examples:
1. (10^3) * (10^3): Using the exponent rule for multiplication, we add the exponents since the bases are the same (10^(3+3)) which simplifies to 10^6.
2. (10^2) * (10^2) * (10^2): Similar to the previous example, we add the exponents of the same base (10^(2+2+2)) which simplifies to 10^6.
3. (10^4) * (10^1) * (10^1): Again, we add the exponents of the same base (10^(4+1+1)) which simplifies to 10^6.
4. (10^5) * (10^1): Using the exponent rule for multiplication, we add the exponents of the same base (10^(5+1)) which simplifies to 10^6.

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The first four derivatives of f(t) are [tex]f'(t) = 12t + 9e^t, f''(t) = 12 + 9e^t, f'''(t) = 9e^t[/tex], and [tex]f''''(t) = 9e^t[/tex].

The given function is [tex]f(t) = 6t^2+ 9e^t[/tex].

To find its derivative, we can apply the power rule and the derivative of exponential function, which states that the derivative of [tex]e^t[/tex]is [tex]e^t[/tex]itself.

Thus, we get [tex]f'(t) = 12t + 9e^t[/tex].

Applying the power rule again, we get [tex]f''(t) = 12 + 9e^t[/tex].

Taking the derivative one more time, we get [tex]f'''(t) = 9e^t[/tex].

Finally, taking the fourth derivative, we get [tex]f''''(t) = 9e^t[/tex].

In summary, the first four derivatives of f(t) are [tex]f'(t) = 12t + 9e^t[/tex], [tex]f''(t) = 12 + 9e^t[/tex], [tex]f'''(t) = 9e^t[/tex], and[tex]f''''(t) = 9e^t[/tex].

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Answer:

y = |x - 1|

Step-by-step explanation:

This is an absolute value function in the form g(x) = |x - h| + k, where

(h, k) is the vertex, (1, 0).  Substitute these values into the function to get the equation of the graph:

y = |x - 1| + 0 = |x - 1|

Based on the following  observations, we can write the equation of the rational function as: f(x) = (x + 1)/(x - 1)

A rational function is a type of mathematical function that is defined as the ratio of two polynomial functions.

In other words, it is a function that can be expressed as f(x) = p(x)/q(x), where p(x) and q(x) are polynomials and q(x) is not the zero polynomial.

To find the equation of the rational function represented by the given graph, we need to analyze the behavior of the graph and identify its key features. given below are the steps:

Look at the behavior of graph as x approaches infinity and negative infinity. The graph appears to have horizontal asymptotes at y = -1 and y = 1. This suggests that the function has a degree of 1 in both the numerator and denominator.

Identify any vertical asymptotes. The graph have vertical asymptote at x = 1. This suggests that the denominator of the function has a factor of (x - 1).

Look for any x-intercepts or y-intercepts.The graph's x-intercept and y-intercept are both at x = -1 and 1, respectively. This suggests that the numerator of the function has a factor of (x + 1) and that the function has a constant term of 1 in the numerator.

This function has a degree of 1 in both the numerator and denominator, a vertical asymptote at x = 1, and horizontal asymptotes at y = -1 and y = 1. It also has an x-intercept at x = -1 and a y-intercept at y = 1, which match the features of the graph given.

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In order to find that quadrilateral PYRX is a parallelogram, we have to show that its opposite sides are parallel.

Therefore, member QS is a  slant in parallelogram PQRS, it divides the parallelogram into two  harmonious triangles triangle QSP and triangle RQS. Then, angle QSP is  harmonious to angle RQS.  

Since angle SXR is  harmonious to angle PYQ, we can say that that angle QSP is  harmonious to angle RXP. This is due to angles QSP and PYQ are alternate interior angles, and angles RQS and SXR are alternate interior angles, so now they are considered  harmonious.

 Then, we have dyads of  contrary angles that are  harmonious angle QSP is  harmonious to angle RXP, and angle QPS is  harmonious to angle RXS.   Applying  discourse of the binterior angles theorem, we can come to the conclusion that member PS is  resemblant to member RX, and member PQ is  resemblant to member XY.  

Since PY and RX are  contrary sides of quadrilateral PYRX and are  resemblant to member PS, they have to be  resemblant to each other. also, since RX and PQ are  contrary sides of quadrilateral PYRX and they're both  resemblant to member XY, they should be  resemblant to each other.

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The rule that best represents the dilation that was applied to quadrilateral FGHJ to create quadrilateral F'G'H'J' is option B, which is (x, y) à (1.4x, 1.4y).

A dilation is a transformation that changes the size of an object without changing its shape. It is performed by multiplying the coordinates of each point by a scale factor.

In this case, the center of dilation is the origin, which means that the coordinates of each point are multiplied by the same scale factor in both the x and y directions.

The scale factor can be found by comparing the corresponding side lengths of the two quadrilaterals. In this case, the scale factor is 1.4, which means that the lengths of the sides of F'G'H'J' are 1.4 times the lengths of the corresponding sides of FGHJ.

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The given expression, 14⁻³ · 14¹², written as a single, positive exponent is 14⁹

From the question, we are to write the given expression using a single, positive exponent

From the given information,

The given expression is

14⁻³ · 14¹²

This means

14⁻³ × 14¹²

To solve this, let us revise some of the laws of indices

Thus,

The expression

14⁻³ × 14¹²

can be written as

14⁻³ ⁺ ¹²

14⁹

Hence, the expression written as a single exponent is 14⁹

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Answer:

Step-by-step explanation:

201.87 + 3(9.82) + 15.79 + 32.80(o) < 480

247.12 + 32.80(o) < 480

32.80(o) < 480 - 247.12

32.80(o) < 232.88

o < 232.88/32.8

o < 7.1

He can purchase 7 outfits and stay within the $480 budget

The production level that will maximize profit is 80 units

To find the production level that will maximize profit given the cost function C(q) = 660 + 5q + 0.03q^2 and demand function p = 10 - q/400, follow these steps:

1. Write down the revenue function: Revenue (R) is the product of price (p) and quantity (q). So, R(q) = p * q.

2. Substitute the demand function into the revenue function: R(q) = (10 - q/400) * q

3. Simplify the revenue function: R(q) = 10q - q^2/400

4. Write down the profit function: Profit (P) is the difference between revenue and cost. So, P(q) = R(q) - C(q).

5. Substitute the revenue and cost functions into the profit function: P(q) = (10q - q^2/400) - (660 + 5q + 0.03q^2)

6. Simplify the profit function: P(q) = 10q - q^2/400 - 660 - 5q - 0.03q^2

7. Combine like terms: P(q) = 5q - q^2/400 - 0.03q^2 - 660

8. Differentiate the profit function with respect to q to find the first derivative: P'(q) = 5 - q/200 - 0.06q

9. Set the first derivative equal to 0 and solve for q: 5 - q/200 - 0.06q = 0

10. Solve for q: q ≈ 80

The production level that will maximize profit is approximately 80 units (rounded to the nearest whole number).

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The probability of drawing a shape that is red or a circle is 7/16 from the bag that contains 4 red circles, 3 blue circles, and 9 yellow triangles.

Number of red circles = 4

Number of blue circles = 3

Number of yellow triangles = 9

Total number of all items = 4+3+9 = 16

Thus, the total number of possible outcomes is 16.

The probability of getting a red shape  = 4/16

The probability of getting a circle   = 4/16 + 3/16 = 7/16

To calculate the probability of drawing an item circle or red color,

P(red or circle) = P(red) + P(circle) - P(red and circle)

P(red or circle) = 4/16 + 7/16 - 4/16

P(red or circle) = 7/16

Therefore, we can conclude that the probability of drawing a shape that is red or a circle is 7/16.

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The approximate volume of the cylinder with a diameter of 14cm and height of 49cm is 10780.78 cubic centimeters, calculated using the formula V=πr²h.

To calculate the volume of a cylinder, we use the formula

Volume = πr²h

where π is pi, r is the radius of the cylinder, h is the height of the cylinder.

We are given the diameter of the cylinder, which is 14 cm. The radius of the cylinder is half of the diameter, so

radius = diameter / 2 = 14 cm / 2 = 7 cm

The height of the cylinder is given as 49 cm.

Now we can use the formula to find the volume of the cylinder

Volume = πr²h = 3.14 x 7² x 49 = 10780.78 cubic centimeters (rounded to two decimal places)

Therefore, the approximate volume of the cylinder is 10780.78 cubic centimeters.

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--The given question is incomplete, the complete question is given

" What is the approximate volume of the cylinder? when diameter is 14cm height is 49cm (Use 3. 14 as an approximation of pi. )"--

The volume of the unit cube is 1 cubic unit, and since it is divided into identical rectangular prisms, each of those prisms has the same volume. Therefore, the volume of one of the identical prisms is also 1 cubic unit.

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The product 5x^(2/3) can be written as the product of the whole number 5 and the unit fraction 1/x^(-2/3), which simplifies to x^(2/3)/1 or just x^(2/3). So, we have:

5x^(2/3) = 5 * (1/x^(-2/3)) = 5x^(2/3) = 5 * (x^(2/3) / 1) = 5x^(2/3) = 5x^(2/3)

To write the product 5x^(2/3) as the product of a whole number and a unit fraction, we need to express x^(2/3) as a unit fraction.

Recall that a unit fraction is a fraction with a numerator of 1, so we need to find a fraction that has 1 as the numerator and x^(2/3) as the denominator. We can do this by using the reciprocal property of exponents:

x^(2/3) = 1 / x^(-2/3)

Now we can substitute this expression into the original product:

5x^(2/3) = 5 * (1 / x^(-2/3))

Simplifying the right-hand side of the equation, we can write it as:

5 / x^(-2/3) = 5x^(2/3)

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The probability of the event BE falling on a random point AK is 4/11

A probability event can be defined as a set of outcomes of an experiment. In other words, an event in probability is the subset of the respective sample space.

In this problem, we need to determine our sample space;

The sample space = 11

The number of favorable outcomes = 4

The probability of a random point on AK to be on BE will be;

P = 4 / 11

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The volume of the rain barrel is approximately 10,256.58 cubic inches.

To get the volume of the rain barrel, which is shaped like a right circular cylinder, you need to use the formula for the volume of a cylinder: V = πr²h. Here, V represents the volume, r is the radius, and h is the height of the cylinder.
The given diameter of the rain barrel is 22 inches. To find the radius (r), you need to divide the diameter by 2:
r = 22 / 2 = 11 inches.
The height (h) of the rain barrel is given as 27 inches.
Now, you can plug these values into the formula and use 3.14 for pi (π):
V = πr²h
V = 3.14 * (11²) * 27
V = 3.14 * (121) * 27
V = 3.14 * 3267
V ≈ 10,256.58 cubic inches
So, the volume of the rain barrel is approximately 10,256.58 cubic inches.

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A region is bounded by the curves  y = sinπ x ,  y = 4 x − 1 , and the x-axis. determine the area of the region. use the area formula for a triangle to expedite the calculation and show all your work.

To find the area of the region bounded by the curves y = sin(πx), y = 4x - 1, and the x-axis, we need to first find the points of intersection of the curves.

Setting y = sin(πx) and y = 4x - 1 equal to each other, we get:

sin(πx) = 4x - 1

Solving for x is difficult algebraically, so we can use numerical methods or graphing to estimate the solutions. A graph of the two curves shows that they intersect at approximately x = 0.161 and x = 1.239.

Next, we can find the area of the region by breaking it up into two parts: a triangle and a region bounded by the curve y = sin(πx), the x-axis, and the vertical lines x = 0.161 and x = 1.239.

The triangle has base 1.239 - 0.161 = 1.078 and height 4(1.239) - 1 = 3.956. Using the formula for the area of a triangle, we get:

Area of triangle = (1/2) * base * height

= (1/2) * 1.078 * 3.956

= 2.148

To find the area of the region bounded by y = sin(πx), the x-axis, and the vertical lines x = 0.161 and x = 1.239, we can use integration:

∫ from 0.161 to 1.239 of sin(πx) dx = [-cos(πx)/π] from 0.161 to 1.239 = [-cos(π(1.239))/π] - [-cos(π(0.161))/π] = (1/π) * (cos(0.161π) - cos(1.239π))

Using a calculator, we get:

(1/π) * (cos(0.161π) - cos(1.239π)) ≈ 0.696

Therefore, the total area of the region is:

Area = 2.148 + 0.696

= 2.844 (rounded to three decimal places)

So the area of the region bounded by the curves y = sin(πx), y = 4x - 1, and the x-axis is approximately 2.844 square units.

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Revenue from the sale of 3,000 pairs of shoes is $51,000.

To find the revenue function, we need to integrate the marginal revenue function R'(x) with respect to x.

R(x) = ∫R'(x) dx

R(x) = ∫(32 - 0.01x) dx

R(x) = 32x - 0.005x² + C

To find the constant C, we use the fact that R(0) = 0.

0 = 32(0) - 0.005(0)² + C

C = 0

Therefore, the revenue function is:

R(x) = 32x - 0.005x²

To find the revenue from the sale of 3,000 pairs of shoes, we simply plug in x = 3,000 into the revenue function:

R(3,000) = 32(3,000) - 0.005(3,000)²

R(3,000) = 96,000 - 45,000

R(3,000) = 51,000

Therefore, the revenue from the sale of 3,000 pairs of shoes is $51,000.

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a. Null hypothesis (H0): μ1 = μ2 and Alternative hypothesis (H1): μ1 < μ2. b. The test statistic is -2.57 and p-value is  0.005 for the hypothesis test. c. At α = 0.05 it can be concluded that CPAs in states with flat state income tax rates work fewer hours per week during tax season compared to the average U.S. CPAs.

a. First, let's formulate the hypotheses:

Null hypothesis (H0): μ1 = μ2, which means that the mean hours worked per week during tax season by CPAs in states with flat state income tax rates is equal to the mean hours worked per week by all U.S. CPAs during tax season.

Alternative hypothesis (H1): μ1 < μ2, which means that the mean hours worked per week during tax season by CPAs in states with flat state income tax rates is less than the mean hours worked per week by all U.S. CPAs during tax season.

b. Now, let's compute the test statistic and p-value using the given sample data:

Sample mean (x) = 55 hours

Population mean (μ) = 60 hours

Population standard deviation (σ) = 27.4 hours

Sample size (n) = 150

We'll use the z-test for this hypothesis test:

z = (x - μ) / (σ / √n) = (55 - 60) / (27.4 / √150) ≈ -2.57

To find the p-value, we need to look up the z-value in the standard normal table, which gives us a p-value of approximately 0.005.

c. Lastly, let's draw our conclusion using α = 0.05:

Since the p-value (0.005) is less than α (0.05), we reject the null hypothesis (H0). This suggests that CPAs in states with flat state income tax rates work fewer hours per week during tax season compared to the average U.S. CPAs.

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Answer: 6

Step-by-step explanation:

So, he wears the shirt 10 out of 20 days.

10 days is half of 20 days.

This means he wears the shirt approximately half of the time, by the logic of 10/20 days.

So, now we apply this to 12 days.

What's half of 12? 6.

This means that he most likely wears the green shirt on 6 out of the 12 days.

Estimated  large sample size need to be selected for the 90%  of confidence level with standard deviation of $900 is equal to 24.

Standard deviation = $900

Confidence level = 90%

Estimate the required sample size,

Use the formula for the margin of error,

Margin of Error = Z × (standard deviation / √(sample size))

where Z is the z-score corresponding to the desired level of confidence.

Using attached z-score table,

For 90% confidence level, Z = 1.645.

Rearrange the formula to solve for the sample size,

Sample size = (Z × standard deviation / margin of error) ^ 2

Substituting the given values, we get,

⇒ Sample size = (1.645 × 900 / 300) ^ 2

⇒ Sample size = 24.35

Round up to the nearest whole number = 24

Therefore, need a sample size of at least 28 to ensure that it is large enough to achieve the desired level of confidence level.

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