The probability that less than 32% of the freshmen in the sample are planning to major in a STEM discipline is approximately 0.9049.
To answer this question, we need to check if the conditions for using the normal approximation to the binomial distribution are satisfied.
The conditions are:
The sample is a simple random sample.
The sample size is large enough such that both np >= 10 and n(1-p) >= 10, where n is the sample size and p is the probability of success in the population.
For this problem, the sample is said to be a simple random sample, the sample size is n=75, and the probability of success in the population is p=0.26.
We check the conditions:
np = 75 × 0.26 = 19.5
n(1-p) = 75 × (1-0.26) = 55.5
Both np and n(1-p) are greater than or equal to 10, so the conditions for using the normal approximation are satisfied.
To find the probability that less than 32% of the freshmen in the sample are planning to major in a STEM discipline, we can use the normal approximation to the binomial distribution:
mean = np = 75 × 0.26 = 19.5
standard deviation = √(np(1-p)) = √(75 × 0.26 × 0.74) = 3.43
To find the probability that less than 32% of the freshmen in the sample are planning to major in a STEM discipline, we need to standardize the value of 32% using the formula:
z = (x - mean) / standard deviation
where x is the value we are interested in, the mean is the mean of the binomial distribution, and the standard deviation is the standard deviation of the binomial distribution.
In this case, x = 0.32 × 75 = 24, mean = 19.5, and standard deviation = 3.43. Therefore,
z = (24 - 19.5) / 3.43 = 1.31
Using a standard normal distribution table or a calculator, we can find that the probability of a standard normal variable is less than 1.31 is 0.9049.
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The question is -
Future scientists: Education professionals refer to science, technology, engineering, and mathematics as the STEM disciplines. A research group reported that 26% of freshmen entering college in a recent year planned to major in a STEM discipline. A random sample of 75 freshmen is selected. Round the answer to at least four decimal places. Is it appropriate to use the normal approximation to find the probability that less than 32% of the freshmen in the sample are planning to major in a STEM discipline?
- The table shows the number of
miles Michael ran each day over
the past four days. How many
more miles did he run on day 3
than on day 2? Determine if there
is extra or missing information.
By conducting subtraction we know that Michael ran 5 miles more on day 3 than on day 2.
What is subtraction?The four arithmetic operations are addition, multiplication, division, and subtraction.
Removal of items from a collection is represented by the operation of subtraction.
For instance, in the following image, there are 5 2 peaches, which means that 5 peaches have had 2 removed, leaving a total of 3 peaches.
The number that the other number is deducted from is known as a minuend.
Subtrahend: The amount that needs to be deducted from the minuend is known as a subtrahend.
Difference: A difference is an outcome obtained by deducting a subtractor from a minimum.
So, more miles Michael ran on day 3 than on day 2:
= 7 - 2
= 5 miles
Therefore, by conducting subtraction we know that Michael ran 5 miles more on day 3 than on day 2.
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Todd Jefferson can buy 2 gallons of ice cream for $3.87, 3 gallons for $4.10, or 1 gallon for $1.98. What is the unit price of the best buy, rounded to the nearest tenth of a cent?
instead of using the values {1, 2, 3, 4, 5, 6} on dice, suppose a pair of dice have the following: {1, 2, 2, 3, 3, 4} on one die and {1, 3, 4, 5, 6, 8} on the other. find the probability of rolling a sum of 6 with these dice. be sure to reduce
Answer:
your answer to the lowest terms
The probability of rolling a sum of 6 with these dice is 1/12.
When conducting a survey, which of the following is the most important reason to use a random sample? Correct. Random selection ensures that the sample is unbiased on average, so that the results of the study can be generalized to the population.
Random sampling is crucial when surveying as it ensures that the sample selected is representative of the population.
By randomly selecting participants from the population, the sample is likely to be unbiased on average, which means that the results of the study can be generalized to the entire population. Without random sampling, the results of the study may be skewed or biased towards a certain group, which can lead to incorrect conclusions and poor decision-making. Therefore, it is essential to use random sampling when surveying to obtain accurate and reliable results.
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How many proper subsets are in {2,4,6,8...100}
Answer:
159 proper subsets.
Step-by-step explanation:
Given a set {2, 4, 6, 8...100}, how many proper subsets are there?
First, find how many subsets there are in 2 - 10:
That's 16.
Then because there are 10 10s in 100, multiply by 10:
16 x 10 = 160
Finally, because it says proper subsets, subtract by 1:
160 - 1 = 159 proper subsets.
Therefore, there are 159 proper subsets in {2, 4, 6, 8...100}
3.1 Mrs Gilfillan owns a coffee shop. She serves a mixed berry and almond polenta cake that is baked in espresso cups at her coffee shop. She uses the recipe below to make the cake. Mixed Berry and Almond Polenta Calce Makes 15 espresso cups Ingredients 140 g butter 140 g castor sugar 140 g ground almonds 250 g fat-free cottage cheese 75 g mixed frozen berries 25 g polenta 6 eggs separated (keep the yolks for mayonnaise or scrambled egg) Bake at 356 °F until light brown, 30 to 40 minutes. Fat-free cottage cheese is sold in quantities of 125g at R8,99. Calculate the cost of the fat-free cottage cheese required in the recipe.
The cost of the fat-free cottage cheese required in the recipe is R17.98.
How to determine the cost ?
To determine the cost, we first need to calculate the amount of fat-free cottage cheese required in the recipe. The recipe calls for 250g of fat-free cottage cheese, which can be obtained by using 2 units of 125g each. Knowing the cost of ingredients is important for Mrs Gilfillan to price the cake appropriately to cover her costs and make a profit.
What is the cost of the fat-free cottage cheese required to make the Mixed Berry and Almond Polenta Cake recipe that serves 15 espresso cups at Mrs Gilfillan's coffee shop?
The cost of 1 unit of 125g fat-free cottage cheese is R8.99.
Therefore, the cost of 2 units of 125g is calculated as:
R (2 x 8.99) =R 17.98
Hence, the cost of the fat-free cottage cheese required in the recipe is R 17.98.
This cost is in addition to the cost of the other ingredients, such as butter, sugar, ground almonds, mixed frozen berries, and polenta, as well as the cost of labor, overhead, and other expenses involved in making and selling the cake.
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What percentage of 23 miles is 27 miles
taking 23(origin amount) as the 100%, what is 27 off of it in percentage?
[tex]\begin{array}{ccll} amount&\%\\ \cline{1-2} 23 & 100\\ 27& x \end{array} \implies \cfrac{23}{27}~~=~~\cfrac{100}{x} \\\\\\ 23x=2700\implies x=\cfrac{2700}{23}\implies x\approx 117.39[/tex]
FAST
Write two expressions to represent the following situation. Then, find the answer.
When Nathan went to bed, the outside temperature was 28°F. When he woke up the next morning, the temperature had decreased to -13°F. By how many degrees did the temperature change during the overnight hours
The temperature changed by 41°F during the overnight hours, decreasing from 28°F to -13°F.
How is an expression determined?The difference in temperature from 28°F to -13°F can be shown in one of two ways:
Temperature change equals final temperature - The starting temperatureTemperature change: (-13°F) - (28°F)Temperature change: -41°FTemperature change = final temperature minus initial temperature; temperature change = -13°F minus 28°F; temperature change = -41°F; temperature change = 41°F.To calculate the change in temperature, the first exponent equation subtracts the initial temperature from the end temperature. The change in this instance is negative and points to a drop in temperature.
The absolute value function is employed in the second statement to guarantee a positive result regardless of whether the temperature rose or fell. The result is the same as the first expression in this instance, but with a positive sign.
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create a formula with structured references to calculate the percentage of the Sticker Price in column E. Columns C and D have the sticker price and sale price, respectively.
The formula to calculate the percentage of the Sticker Price in column E using structured references would be:
=IFERROR((1-[Sale Price]/[Sticker Price])*100,"% Discount")
Define the term percentage?A number or quantity can be expressed as a fraction of 100 using a percentage.It is often denoted by the symbol % (percent).
Assuming that the Sticker Price is located in column C and the Sale Price is located in column D, the formula to calculate the percentage of the Sticker Price in column E using structured references would be:
=IFERROR((1-[Sale Price]/[Sticker Price])*100,"% Discount")
In this formula, the percentage of the Sticker Price is calculated by subtracting the Sale Price from the Sticker Price, dividing the difference by the Sticker Price, and then multiply by 100 to convert the result into percentage. The IFERROR function is used to handle any errors that may occur if the Sale Price is missing or is equal to or greater than the Sticker Price. If an error occurs, the formula will display the text "% Discount".
Note that the structured references [Sale Price] and [Sticker Price] refer to the column headers rather than the cell references. This makes the formula more dynamic and easier to read, especially when working with large datasets.
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A car travelling north at 48 km/hr is approaching an intersection. A truck travelling East at 60 km/hr is moving away from the same intersection. How is the distance between the car and the truck changing when the car is 9 m from the intersection and the truck is 40 m from the intersection?
The rate at which the distance between the car and the truck is changing when the car is 9 m from the intersection and the truck is 40 m from the intersection is about 19.187 m/s
What is the rate of change of a function?The rate of change of a function is an indication of how fast the function's output changes per unit change in the input of the function.
Let y represent the distance of the car from the intersection, and let x represent the distance of the truck from the intersection, we get;
The distance between the car and the truck, d, can be obtained from Pythagorean Theorem as follows;
d² = y² + x²
2·d·d/dt = 2·y·dy/dt + 2·x·dx/dt
dy/dt = The speed of the car = 48 km/h = 40/3 m/s
dx/dt = The speed of the truck = 60 km/h = 50/3 m/s
y = The distance of the car from the intersection = 9 m
x = The distance of the truck from the intersection = 40 m
d² = 9² + 40² = 1681
d = √(1681) = 41
d = 41 m
Therefore;
2×41×d/dt = 2×9 × 40/3 + 2 × 40 × 50/3 = 4720/3
d/dt = 4720/3/(2 × 41) = 2360/123 ≈ 19.187
d/dt ≈ 19.187 m/s
The rate of change distance between the car and the truck d/dt is about 19.187 m/s
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k is what or is it none for the equation?
The piecewise function will be continuous in its domain if k = 49/48
How to find the value of k such that the function is continuous?Here we have a piecewise function and we want to find the value of k suc that the function is continuous on the domain.
To get that, both piecese of the function must ahve the same value in the jump, then we will get:
f(7) = f(7)
Replacing the functions we will get:
k·7² = 7·7 + k
Let's solve that equation for k.
49k = 49 + k
49k - k = 49
48k = 49
k = 49/48
That must be the value of k such that the function is continuous in all its domain.
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Justin purchased his dream car worth 18500 on a finance for 4 years. He was offered 6% interest rate.assuming no other chargers and no tax,we want to find his monthly installment.
Answer:
To calculate the monthly installment for Justin's car loan, we can use the formula for the present value of an annuity:
PV = (PMT / r) x [1 - 1 / (1 + r)^n]
where PV is the present value of the loan, PMT is the monthly payment, r is the interest rate per period (in this case, per month), and n is the number of periods (in this case, the number of months in 4 years, which is 48).
We know that PV is the amount of the car loan, which is N$18500. We also know that r is 6% per year, which is equivalent to 0.5% per month (since there are 12 months in a year). Finally, we know that n is 48.
Substituting these values into the formula, we get:
18500 = (PMT / 0.005) x [1 - 1 / (1 + 0.005)^48]
Simplifying this expression:
18500 = (PMT / 0.005) x 36.4358
PMT = 18500 / 36.4358 / 0.005
PMT ≈ N$402.87
Therefore, Justin's monthly installment for his car loan is approximately N$402.87.
A rectangular picture is 7 inches by 5 inches and has a border of uniform width surrounding it. If the area of the picture and the border is 80 square inches find the width of the border
The width of the rectangle border is 3 in.
What is area of rectangle?
The area a rectangle occupies is the space it takes up inside the limitations of its four sides. The dimensions of a rectangle determine its area. In essence, the area of a rectangle is equal to the sum of its length and breadth.
Here We know that ,
Area of the rectangle = length* width square unit.
Here area of the picture and border is 80 [tex]in^2[/tex] Then,
=> (7+w)*(5+w)=80
=> [tex]35+5w+7w+w^2=80[/tex]
=> [tex]12w+w^2=45[/tex]
=> [tex]w^2+12w-45=0[/tex]
=> [tex]w^2+15w-3w-45=0[/tex]
=> w(w+15)-3(w+15)=0
=> (w-3)(w+15)=0
=> w=3 , w=-15( negative is neglected)
Hence the width of the rectangle border is 3 in.
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Use Synthetic Division to find the quotient of the division between
x4-2x3+2x2-9x +10 and (x-2).
x^3 + 2x - 5
x^3 + x + 4
x^4 + 2x - 5
x^2 - 2x + 5
Using synthetic division for the given dividend and divisor the required quotient is given by option a. x^3 + 2x - 5.
Dividend is equal to,
x^4-2x^3+2x^2-9x +10
Divisor is equal to,
( x - 2 )
Using synthetic division we have,
Use double equals to method to simplify the dividend we have,
x^4-2x^3+2x^2-9x +10
= x^4 - 2x^3 + 2x^2 - 4x -5x + 10
= x^3 (x -2) + 2x ( x -2 ) - 5 ( x - 2 )
= ( x - 2 ) ( x^3 + 2x - 5 )
Now ,
Simplify by dividing it,
( x^4-2x^3+2x^2-9x +10 ) ÷ ( x - 2 )
= ( x - 2 ) ( x^3 + 2x - 5 ) ÷ ( x -2 )
= ( x^3 + 2x - 5 )
Therefore, the quotient of the synthetic division for the given dividend is equal to option a . ( x^3 + 2x - 5 ).
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which statements are true about the reflectional symmetry of a regular heptagon? select two options. it has only 1 line of ref
the regular heptagon has only one line of reflectional symmetry, and it passes through the center of the heptagon. This property is common to all regular polygons, and it is related to their rotational symmetry.
The statements that are true about the reflectional symmetryof a regular heptagon are:
It has only one line of reflectional symmetry.
The line of reflectional symmetry passes through the center of the heptagon.
A regular heptagon is a polygon with seven equal sides and angles. Each vertex of the heptagon is equidistant from the center of the heptagon, and the lines connecting the center to the vertices divide the heptagon into seven congruent triangles.
To understand the reflectional symmetry of the regular heptagon, we need to define what it means. Reflectional symmetry is a type of symmetry where a figure is symmetric with respect to a line. In other words, if we fold the figure along this line, one half will coincide with the other half.
In the case of the regular heptagon, we can observe that if we draw a line passing through the center of the heptagon and perpendicular to any of its sides, we obtain a line of reflectional symmetry. This line divides the heptagon into two congruent halves. However, if we draw any other line of reflectional symmetry, it will not coincide with the sides of the heptagon, and therefore, it will not divide the heptagon into congruent halves.
Therefore, we conclude that the regular heptagon has only one line of reflectional symmetry, and it passes through the center of the heptagon. This property is common to all regular polygons, and it is related to their rotational symmetry.
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divide 1350 into 5:4 and then do the same for 261
Answer:
a) 750 and 600,
b) 145 and 116.
Step-by-step explanation:
A) For 1350 divided to two as 5 : 4, we need to add 5 and 4 first = 9:
Then, with the following, calculate the amount for 5:
[tex]\frac{1350}{9}[/tex] x 5
150 x 5
= 750 for 5, then for 4:
150 x 4
= 600 for 4.
B) For 261 divided with into 5 : 4, we need to add 5 and 4 = 9:
Then, with the following, calculate the amount for 5:
[tex]\frac{261}{9}[/tex] x 5
29 x 5
= 145 for 5. Finally, for 4:
29 x 4
= 116 for 4.
What’s 9 X 3/9 answer…………………………………….
Answer:
9 x 3/9
= 39 ⋅ 3= 2727/9
27 ÷ 9
= 3Step-by-step explanation:
You're welcome.
(the ine on top) The drawing below shows similar triangles representing a boy and his shadow compared to a tree and its shadow
A.27.4
B.37.3
C.40.0
D.42.0
(on bottom) if the sun is at an angle of 30• from the horizontal and a tree casts a 15- meter shadow in ground which is closest to the height of the tree
A. 7.5
B. 8.7
C. 13.0
D 26.0
The height of the tree is closest to 8.66 meters (option B).
What is angle of elevation?Angle of elevation is the angle between a horizontal line of sight and an object above the line of sight, as measured from the observer's eye.
In other words, it is the angle formed between the observer's line of sight and the line drawn from the observer's eye to the object being observed, when the object is above the observer's eye level.
To solve this problem, we can use the property of similar triangles, which states that the ratios of corresponding sides of similar triangles are equal.
For the boy and his shadow, we have:
height of boy / length of boy's shadow = height of tree / length of tree's shadow
Substituting the values given, we get:
56 / 48 = height of tree / x, where x is the length of the tree's shadow
Solving for the height of the tree, we get:
height of tree = (56 / 48) * x
We are not given the length of the tree's shadow, but we can use the information given in the second part of the problem to find it.
For the tree and its shadow, we have:
height of tree / length of tree's shadow = tan(30)
Substituting the value of the length of the tree's shadow as 15 meters and solving for the height of the tree, we get:
height of tree = 15 * tan(30)
height of tree ≈ 8.66 meters
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expand and simplify.
(m–3)(m+2)
Answer:
m^2-m-6
Step-by-step explanation:
(m-3)(m+2)
m^2 +2m-3m-6
m^2-m-6
Answer:
m² - m - 6
Step-by-step explanation:
(m - 3)(m + 2)
each term in the second factor is multiplied by each term in the first factor, that is
m(m + 2) - 3(m + 2) ← distribute parenthesis
= m² + 2m - 3m - 6 ← collect like terms
= m² - m - 6
I will mark you brainiest!
What are the values of each of the exterior angles?
A) 30º, 30º, 60º, 60º
B) 90º, 90º, 180º, 180
C) 60º, 60º, 120º, 120º
Answer:
C) 60º, 60º, 120º, 120º
Step-by-step explanation:
We know the sum of all the angles in a rectangle is 360 degrees, whether it's irregular or not.
Given: x + 2x + 2x + x = 360
Calculate the linear equation, to find x.
x + 2x + 2x + x = 360
3x + 3x = 360
6x = 360 (Divide both sides by 6)
x = 60 degrees.
Then you can calculate the polygons.
x + 2x + 2x + x
For the first x, = 60.
Then for 2x, 60 * 2 = 120.
Then for 2x again, = 120.
Finally for the last x, = 60.
Therefore, the answer is C) 60º, 60º, 120º, 120º.
help plssss explainnn!!
Answer:
[tex]xy^8[/tex]
Step-by-step explanation:
Notice if you have the same base you can ADD the exponent, for example:
[tex]x^{-6} x^{7} =x^{-6+7}=x^{1 }=x[/tex]
[tex]y^{6} y^{2} =y^{6+2}=y^{8 }\\[/tex]
so the answer is
[tex]xy^8[/tex]
Mark is going to an awards dinner and wants to dress appropriately. He is running behind schedule and asks his little brother to randomly select an outfit for him.
Mark has one blue dress shirt, one white dress shirt, one black dress shirt, one pair of black slacks, one pair of grey slacks, and one red tie. All six of his possible outfits are listed below.
Let
A
AA be the event that Mark's little brother selects an outfit with a white shirt and grey slacks and
B
BB be the event that he selects an outfit with a black shirt.
What is
P
(
A
or
B
)
P(A or B)P, left parenthesis, A, start text, space, o, r, space, end text, B, right parenthesis, the probability that Mark's little brother selects an outfit with a white shirt and grey slacks or an outfit with a black shirt?
Volume: Count the Cubes
**HELP!**
If you help me it’ll be worth 30 points!
Answer:
1.5 2.4 3.8
Step-by-step explanation:
1. 5
2. 4
3. 8
4. 6
5. 8
6. 15
7. 8
8. 12
9. 6
5. What is the difference between (-3)² and 3²
Answer:
the difference is the first one, (-3)^2, is negative while the other is positive
Step-by-step explanation:
1 The contractor is still paying for the truck (water tanker) and it is covered for insurance. 1.1 nights Write down the Loan term of the truck in years
Answer:
Unfortunately, the provided statement does not contain sufficient information to determine the loan term of the truck.
Step-by-step explanation:
The loan term refers to the length of time over which the loan for the truck is scheduled to be repaid. It is typically determined at the time of purchase and specified in the loan agreement.
To determine the loan term of the truck, we would need to know additional information such as the date of purchase, the loan agreement terms, the payment schedule, and any other relevant details about the loan.
Martin has a spinner that is divided into four sections labeled A, B, C, and D. He spins the spinner twice. PLEASE ANSWER RIGHT HELP EASY THANK UU
Drag the letter pairs into the boxes to correctly complete the table and show the sample space of Martin's experiment..
The diagram included shows the letter pairs that should go into each box to appropriately finish the table and display the sample area of Martin's experiment.
Explain about the sample space of an event?A common example of a random experiment is rolling a regular six-sided die. For this action, all possible outcomes/sample space can be specified, but the actual result on any given experimental trial cannot be determined with certainty.
When this happens, we want to give each event—like rolling a two—a number that represents the likelihood of the occurrence and describes how probable it is that it will occur. Similar to this, we would like to give any event or group of outcomes—say rolling an even number—a probability that reflects how possible it is that the occurrence will take place if the experiment is carried out.Martin features a spinner with four compartments marked A, B, C, and D.
To get the correct result of the filling, first take the value of the horizontal bar and write the value from the corresponding vertical bar where both column are meeting.
Thus, the diagram included shows the letter pairs that should go into each box to appropriately finish the table and display the sample area of Martin's experiment.
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First-year students at a university must take history or philosophy during their first semester. 400 are enrolled in both out of a total of 1200 first-year students. If 600 are enrolled in philosophy, how many are taking history?
Answer: I really don't know I'm just trying to get a quest done sorry
How do you find the slope of (-4, 8) and (4, 2)
To find the slope of a line that passes through two points, you can use the slope formula. The slope formula is:
Slope = (y2 - y1) / (x2 - x1)
Using the points given in your question, the slope formula to find the slope of the line is:
Slope = (2 - 8) / (4 - (-4))
Using the order of operations, the calculation of the slope formula is as follows:
Slope = -6 / 8
Therefore, the slope of the line passing through (-4, 8) and (4, 2) is -3/4.
do the compression values seem resonable given the 3 2 1 mix design, 0.50 w/c ratio and 7 days of curing
The mix design and w/c ratio used in the concrete mix are commonly used for M15 grade concrete, and achieving a compressive strength of 18 MPa after 7 days of curing may be reasonable depending on the target strength and other design specifications.
The actual compressive strength of 18 MPa achieved after 7 days of curing may be lower or higher than the target strength, depending on the design specifications and requirements.
However, the mix design of 3:2:1 (cement:sand:aggregate) with a water-cement (w/c) ratio of 0.50 is a commonly used mix proportion for M15 grade concrete. With proper curing and compaction, this mix design should be capable of achieving a compressive strength of at least 15 MPa at 28 days of curing.
The compressive strength is typically measured after 28 days of curing, not just 7 days. Therefore, it may be premature to conclude whether the achieved compressive strength of 18 MPa is reasonable without testing the concrete at 28 days of curing.
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_____The given question is incomplete, the complete question is given below:
do the compression values seem resonable given the 3:2:1. mix design, 0.50 w/c ratio and 7 days of curing. M 15 grade concrete
Cement = 3 Part
Sand = 2 Part
Aggregate = 1 Part
Total dry volume of Material Required = 1.57 cu.m
actual compressive strength of the concrete = 18 MPa
which best describes the resulting three-dimensional figure?
The resulting three-dimensional figure is a cone with base radius of 17 inches.
What is a cone?A cone is a three-dimensional geometric shape that has a circular base and a curved surface that tapers to a point, called the apex. The base of the cone is a circle, and the height of the cone is the perpendicular distance from the apex to the center of the base. The surface of the cone is made up of all the points that are equidistant from the apex and lie on the base.
According to the given information :Consider an isosceles triangle with 82 inches of circumference and a leg length of 24 inches.
This means that 82 - 2(24) = 82 - 48 = 34 inches is the length of the other side.
The triangle is rotated along a line that passes through points B and D, with point D serving as the intersection of lines AC.
When this happens, a cone will be created in three dimensions with a base radius equal to the length of line AD (i.e. half of the length of line AC being the other side of the isosceles triangle).
The resulting cone's base radius is 1/2 (34) = 17 inches.
Hence, the resulting three-dimensional figure is a cone with base radius of 17 inches.
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