Answer:
Step-by-step explanation:
y=4/3 x +b
goes through the point (1,3)
3=4/3(1)+b
b=3-4/3
b=9-4/3
b=5/3
equation : y=4/3 x +5/3
The graph of the line with slope of 4/3 and goes through the point (1,3) is shown in attached figure.
What is Equation of line?
The equation of line with slope m and passes through the point (x₁, y₁) is given as;
y - y₁ = m (x - x₁)
Given that;
The slope of line = 4/3
And, Point on line = (1, 3)
Since, The equation of line with slope m and passes through the point (x₁, y₁) is given as;
y - y₁ = m (x - x₁)
Thus, The equation of line with slope 4/3 and passes through the point (1, 3) is given as;
y - 3 = 4/3 (x - 1)
Solve as;
3 (y - 3) = 4 (x - 1)
3y - 9 = 4x - 4
3y = 4x - 4 + 9
3y = 4x + 5
y = 4/3x + 5/3
Thus, The equation of line will be;
y = 4/3x + 5/3
So, The graph of the line y = 4/3x + 5/3 is shown in attached figure.
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The area of a parallelogram is 88.58 sq cm. The length of the base is 8.6 cm. What is the height?
Answer:
10.3 is the length
Step-by-step explanation:
If the area of a parallelogram is B * H then finding one side is dividing area by base or by height
88.58 / 8.6
Answer:
Step-by-step explanation:
88.58 divided by 8.6 is 10.3. That is your answer. 10.3.
∫x216−x2−−−−−−√ dx= 8arcsin(x/4)-4sin(2arcsinx/4) functionsequation editor c (your final answer should be in terms of only x .) note: you can earn partial credit on this problem.
The final answer is 8arcsin(x/4) - 4sin(2arcsin(x/4)) + C, where C represents the constant of integration. The expression is given in terms of x only.
To evaluate the given integral, we can use trigonometric substitution. Let's substitute x = 4sinθ, which allows us to rewrite the integrand in terms of θ. The differential becomes dx = 4cosθ dθ.
Using this substitution, the integral transforms into ∫(4sinθ)²√(16-(4sinθ)²)(4cosθ) dθ. Simplifying this expression yields 16∫sin²θ√(1-cos²θ)cosθ dθ.
We can apply the double-angle identity sin²θ = (1-cos2θ)/2 to simplify further. This results in 8∫(1-cos2θ)√(1-cos²θ)cosθ dθ.
Next, we can apply the trigonometric identity sin(2θ) = 2sinθcosθ to obtain 8∫(sinθ-sin³θ) dθ.
Finally, integrating term by term and substituting back x = 4sinθ, we arrive at the final answer of 8arcsin(x/4) - 4sin(2arcsin(x/4)) + C. This expression represents the antiderivative of the given function in terms of x only, where C represents the constant of integration.
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Please help me!! I don't know what to do!
Answer:
14
Step-by-step explanation:
(7x-1)+(6x-1)=180
13x-2=180
13x=182
x=14
Answer:
x=14
Step-by-step explanation:
Unless on the outside of the parenthesis are zeroes
I NEED THIS SO BAD PLEASE HELP ME!!!!!!!!!!!!!!!!!!!!!
A class has 30 students. 10 students take the bus. What percentage of students take the bus?
Answer:
33.3%
Step-by-step explanation:
10/ 30= 0.3(3 would be a reoccurring decimal)
0.3*100=33.3
10% of students take the bus
I need it simplified help
The answer is 23/40
To simplify this expression, we need to find a common denominator for each pair of fractions that are being added or subtracted.
The common denominator for 1/4 and 1/5 is 20, so we can rewrite 1/4 as 5/20 and 1/5 as 4/20. Then, we can subtract these fractions to get 1/20.
The common denominator for -3/4 and 1/8 is 8, so we can rewrite -3/4 as -6/8. Then, we can add these fractions to get -5/8.
Now, we can combine the two simplified fractions by finding a common denominator of 40. We can do this by multiplying 20 and 8, which gives us 160.
Then, we can rewrite 1/20 as 2/40 and -5/8 as -25/40. Adding these fractions together gives us:
2/40 - 25/40 = -23/40.
The absolute value of any number is always positive so it becomes 23/40.
The simplified version of (1/4 - 1/5) + (-3/4 + 1/8) is 23/40.
Mariya is solving the quadratic equation by completing the square.
4x2-20x+3=0
4x2-20x=-3
A(x2-5x)=-3
What is the value of A?
Answer:
A = 4
Step-by-step explanation:
4x2-20x=-3 and A(x2-5x)=-3
Hence:
4x2-20x = A(x2-5x)
4x^2 - 20x = A(x^2 - 5x)
Divide both sides by (x^2 - 5x) to isolate A:
(4x^2 - 20x)/(x^2 - 5x) = (x^2 - 5x) * A/(x^2 - 5x)
A = (4x^2 - 20x)/(x^2 - 5x)
A = (4x(x - 5)) / (x(x - 5)) ==> factor each polynomial
A = (4x) / (x) * (x - 5)/(x - 5)
A = (4x) / (x) * 1 ==> (x-5)/(x-5) = 1
A = (4x) / (x)
A = 4x/x ==> simplify
A = 4
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FILL IN THE BLANK. you must not pass on a curve or the crest of a hill if you cannot see at least ________ ahead.
You must not pass on a curve or the crest of a hill if you cannot see at least 500 feet ahead.
This statement is referring to a basic safety rule of driving. Passing on a curve or the crest of a hill can be very dangerous since visibility is limited, and the driver may not be able to see approaching vehicles until it is too late to avoid a collision.
The amount of distance that a driver must be able to see ahead before passing depends on various factors such as the speed of the vehicles, road conditions, and weather conditions.
However, a general rule of thumb is that a driver should be able to see at least 400 feet ahead before passing. This distance allows the driver enough time to react if another vehicle suddenly appears or if there is an obstacle on the road.
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50 POINTS
Your parents have heard about your business and would like to invest in it to help you earn as much money this summer as possible. They decide to give you $100 towards your business. However, there's a catch. They want 10% of the money you make.
1. if you mowed 10 lawns while charging $15 a lawn, how much would you have to pay your parents?
2. if you needed to make $300 to buy a switch, how many lawns would you have to mow?(Hint: don't forget about how much you would have to pay your parents.)
3. With all cost taken into account, your start up money, the money your parents gave you and what you paid your parents, how much profit did you make after 20 lawns?
The profit made from the business that receives an initial $100 investment are as follows;
1. The amount received from the investment is $15
2. The number of lawns that should be mowed to buy the switch is 23 lawns
3. The profit made from the business considering the cost and the initial investment of the parents is $170
What is an investment?An investment is the money directed towards an asset purchase to increase the valuation of the business and products within a time period.
The amount invested = $100
The amount desired as return = 10% of the amount made from the business
1. The amount charged per lawn = $15
The number of lawn mowed = 10
The revenue of the business = 10 × $15 = $150
The amount paid as return on investment = 10% × $150 = $15
2. The amount required to buy the switch = $300
The number of lawns to be mowed, n, is therefore;
300 = 15 × n - 10% × 15 × n = 15·n - 1.5·n = 13.5·n
300 = 13.5·n
n = 300/13.5 ≈ 23 ( rounding up to the nearest whole number)
The number of lawns to be mowed is 23 lawns
3. The revenue from mowing 20 lawns is 20 × $15 = $300
The amount received by the investing parents = 10% × $300 = $30
The amount received from the parents investment = $100
The profit made after 20 lawns = $300 - $30 - $100 = $170
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A triangular prism has a triangular base with an area of 6 square centimeters and a perimeter of 12 centimeters. the volume of the prism is 18 cubic centimeters. what is the surface area of the prism?
The required surface area of the prism with area of the triangular base as 6 square centimeters and volume 18 cm³ is given by 12.5√12 square centimeters.
Let the triangular base of the prism be an equilateral triangle with side length s.
Then, the perimeter of the base is 12,
so we have
3s = 12,
⇒s = 4.
The area of the triangular base is
(√3/4)s²
= (√3/4)(4)²
= 4√12
The volume of the prism is equal to 18 cubic centimeters,
Set up the equation V = Bh,
where B is the area of the base
And h is the height of the prism.
Now, solve for $h to get,
h
= V /B
= 18 /4√12
= 9/2√12
= 3√12/8
Lateral surface area of the prism is given by the formula
A = Ph,
where P is the perimeter of the base
And h is the height of the prism.
The perimeter of the base is 12,
height is 3√12/8,
so we have
A = 12 ( 3√12/8 )
= 9√12/2
Total surface area of the prism is the sum of the area of the two triangular bases and the lateral surface area.
Each triangular base has area 4√12,
Total surface area is
= 2 (4√12 ) + 4.5√12
= 12.5√12
Therefore, the surface area of the prism is 12.5√12 square centimeters.
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A trapezoid has an area of 234.06 square feet. One base is 19.2 feet long. The other base is
9 feet long. What is the height?
Answer: Height = 16.6 ft
Step-by-step explanation:
The area of a trapezoid is (b1+b2)*h/2, where b1 and b2 are the bases and h is the height.
We can plug in the values given:
234.06 ft^2 = (19.2 ft + 9 ft)*h/2
We can multiply both sides by 2 and combine like terms:
468.12 ft^2 = 28.2 ft*h
Divide both sides by 28.2 ft:
Height = 16.6 ft
Find the x and y value
Answer:
x = 40 , y = 100
Step-by-step explanation:
3x - 20 and 2x are same- side interior angles and sum to 180° , that is
3x - 20 + 2x = 180
5x - 20 = 180 ( add 20 to both sides )
5x = 200 ( divide both sides by 5 )
x = 40 and 2x = 2 × 40 = 80
--------------------
2x + y are adjacent angles on a straight line and sum to 180° , then
y + 80 = 180 ( subtract 80 from both sides )
y = 100
The following cone has a height of 12 cm and a slant height of 16 cm. A right angle is formed between the height and radius of the cone
what is the length of the radius
Step-by-step explanation:
\(\pink{\large{\underline{\underline{\sf Given:-}}}}\)
\( \sf Height_{\blue{cone}}=12 \: cm \)\( \sf Slant \: height_{\blue{cone}}=16\: cm \)\(\pink{\large{\underline{\underline{\sf To \: find:-}}}}\)
\( \sf Radius_{\blue{cone}}=? \)\(\pink{\large{\underline{\underline{\sf Solution:-}}}}\)
We know that,
\(\underline{\boxed{\sf (Radius)^2= (Slant height)^2-(height)^2}}\)
\( \sf (Radius)^2 = (16)^2-(12)^2\)
\( \sf (Radius)^2 = 256-144=112\)
\( \longmapsto \sf Radius = \sqrt{112}≈10.6\:cm\)
A lawyer willed his 3 sons Rs 250000 to be divided into portions 30%, 45% and 25%. How much did each of them inherit?
Answer:
75000, 112500, 62500
Step-by-step explanation:
To find 1% of 250000:
1/100 x 250000 = 2500 (1% of total)
Son 1: 30x2500 = 75000 (30% of lawyers money)
Son 2: 45x2500 = 112500 (45% of lawyers money)
Son 3: 25x2500 = 62500 (25% of lawyers money)
Heather purchased a new $1,500 laptop by using a credit card with a 17% interest rate. She will pay off the balance in 2 years by paying monthly payments of $74.16. Calculate Heather’s total cost of repayment.
12 months in a year
2 years
2x12=24
74.16x24=1779.84
Heather's total cost of repayment is $1,779.84.
What exactly is a monthly payment?A monthly payment is a payment made every month to pay off loans or advances. It's similar to EMI.
Given,
Principal = $1,500
Rate = 17% per year (or 0.17 as a decimal)
Time = 2 years
Total interest = (principal × rate × time) / 12
Substitute the given values, and we get:
Total interest = (1500 × 0.17 × 2) / 12 = $51
So, Heather will pay a total of $51 in interest over the two years.
Total repayment = monthly payment × number of months
Here,
Monthly payment = $74.16
Number of months = 2 years × 12 months/year = 24 months
Substitute these values, and we get:
Total repayment = $74.16 × 24 = $1,779.84
Therefore, Heather's total cost of repayment is $1,779.84.
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a normal population has a mean 31 and standard deviation 7. what is the probability that a randomly chosen value will be greater than 18?
Answer:
0.969
Step-by-step explanation:
use the z-score formula to convert the values.
z = (X - υ) / σ
where X is the test statistic, υ is the mean, σ is the standard deviation.
z = (18 - 31) / 7
= -1.857
area in z-score table (this is area to left of <18) is 0.0314.
P(>18) = 1 - 0.0314 = 0.969
a A population has a mean of 159.8 kg and a standard deviation of 12.6 kg. Under these circumstances, what z-score correspond to a mass of 148.3 kg? Oz = -1.06 z = -0.91 Oz = -0.85 Oz = 0.91
The z-score corresponding to a mass of 148.3 kg is approximately -0.91.
Z-score is a statistical measurement that describes a value's relationship to the mean of a group of values. Z-score is measured in terms of standard deviations from the mean. If a Z-score is 0, it indicates that the data point's score is identical to the mean score.
A population has a mean of 159.8 kg and a standard deviation of 12.6 kg. To find the z-score corresponding to a mass of 148.3 kg, use the formula: z = (X - μ) / σ, where X is the value (148.3 kg), μ is the mean (159.8 kg), and σ is the standard deviation (12.6 kg).
z = (148.3 - 159.8) / 12.6
z = -11.5 / 12.6
z ≈ -0.91
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I might sound really dum I forgot what shape this is someone please tell me
Answer:
trapezoid
Step-by-step explanation:
its okay i had to look it up to make sure i was right lol
Can i have brianliet plz
a park is in the shape of a regular hexagon 22 km on a side. starting at a corner, alice walks along the perimeter of the park for a distance of 55 km. how many kilometers is she from her starting point?
Alice is 55 km from her starting point after walking a distance of 55 km along the perimeter of the park.
To find the distance Alice is from her starting point after walking along the perimeter of the park, we can use the concept of congruent sides in a regular hexagon.
The perimeter of a regular hexagon is equal to the sum of its six congruent sides. Given that each side of the hexagon is 22 km long, the total perimeter of the hexagon is 6 * 22 km = 132 km.
Since Alice walks a distance of 55 km along the perimeter of the park, we can determine the number of complete laps she makes around the hexagon by dividing the distance she walked by the perimeter of the hexagon: 55 km / 132 km = 0.4167 laps.
As Alice starts and ends at a corner of the hexagon, each complete lap brings her back to the same corner. Therefore, the fractional part of the number of laps represents the portion of the hexagon's perimeter she has traveled beyond the starting corner.
To find the remaining distance from Alice's current position to the starting point, we calculate the fractional part of the number of laps and multiply it by the perimeter of the hexagon: 0.4167 * 132 km = 55 km.
A regular hexagon is a polygon with six congruent sides. In this problem, the regular hexagon represents the shape of the park, and each side of the hexagon has a length of 22 km. The perimeter of the hexagon is found by multiplying the length of one side by the number of sides, which is 6. Therefore, the perimeter of the hexagon is 6 * 22 km = 132 km.
When Alice walks along the perimeter of the park for a distance of 55 km, we need to determine how many complete laps she makes around the hexagon. By dividing the distance she walked by the perimeter of the hexagon, we find that she completes approximately 0.4167 laps.
Since Alice starts and ends at a corner of the hexagon, each complete lap brings her back to the same corner. Therefore, the fractional part of the number of laps represents the portion of the hexagon's perimeter she has traveled beyond the starting corner.
In this case, multiplying 0.4167 by 132 km gives us a result of approximately 55 km. Therefore, Alice is 55 km from her starting point after walking a distance of 55 km along the perimeter of the park.
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If we want to buy 52-week T-bills with denomination $10000, with interest rate 5%, what is the purchase price?
The purchase price of 52-week T-bills with a denomination of $10,000 and an interest rate of 5% can be calculated using the formula for the present value of a future cash flow. The purchase price is $9,523.
To calculate the purchase price of the 52-week T-bills, we need to find the present value (PV) of the future cash flow. The formula for the present value is:
\(PV = FV / (1 + r)^t\)
Where:
PV is the present value (purchase price)
FV is the future value (denomination)
r is the interest rate (in decimal form)
t is the time period (in years)
In this case, the future value (FV) is $10,000, the interest rate (r) is 5% (or 0.05 in decimal form), and the time period (t) is 1 year.
Plugging in the values, we have:
\(PV = 10,000 / (1 + 0.05)^1\)
= 10,000 / 1.05
≈ 9,523
Therefore, the purchase price of the 52-week T-bills with a denomination of $10,000 and an interest rate of 5% is approximately $9,523. This means that to buy the T-bills, one would need to pay $9,523 upfront to receive the $10,000 denomination after 52 weeks.
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What are the partial products? 617 x 2
Answer:
b. 1,200 + 20 + 14
Step-by-step explanation:
617
x
2
______
1234
______
1234 aka. 1,200 + 20 + 14
ly| ≤3
Are the lines on graph at 3 and -3 also part of the answer?
Answer:
Yes, the lines on the graph at 3 and -3 a part of the solution,
Step-by-step explanation:
The inequality \(|y| \leq 3\) contains all the values of \(y\) 3 units from the origin including the values 3 and -3.
Thus, the lines on the graph y =-3 and y = 3 are the part of the solution.
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300% of 7 is what percent of 42?
A. 30%
B. 50%
C. 60%
D. 12.5
Pls show work or don’t answer thanks
Answer:
B) 50%
Step-by-step explanation:
300% is the same as 3. So to find 300% of 7 you do 3 times 7 and get 21.
Now you need to find _% times 42 = 21. Divide 21/42 to get 0.5. This is the same thing as 50%.
Hope it helps and have a nice day! :)
someone please solve this 3n+9n=-2(7-4n)-(1+n)
Answer:
n= -3Step-by-step explanation:
\(3n+9n=-2(7-4n)-(1+n)\\\\\mathrm{Add\:similar\:elements:}\:3n+9n=12n\\\\12n=-2\left(7-4n\right)-\left(1+n\right)\\\\\mathrm{Expand\:}-2\left(7-4n\right)-\left(1+n\right):\quad 7n-15\\\\12n=7n-15\\\\\mathrm{Subtract\:}7n\mathrm{\:from\:both\:sides}\\\\12n-7n=7n-15-7n\\\\Simplify\\\\5n=-15\\\\\mathrm{Divide\:both\:sides\:by\:}5\\\\\frac{5n}{5}=\frac{-15}{5}\\\\Simplify\\\\n=-3\)
Answer:
n=-3
sorry no steps
How do you simplify a fraction formula?
The simplest form of a fraction is when the numerator (top number) and denominator (bottom number) have no common factors.
A fraction is a mathematical expression that represents a part of a whole, where a numerator is divided by a denominator. To simplify a fraction, we must divide both the numerator and the denominator by the same number until we cannot divide any further. To simplify a fraction, you must divide both the numerator and denominator by their greatest common factor (GCF).
For example, let's simplify the fraction 24/36. The GCF of 24 and 36 is 12. So, dividing both numbers by 12 will give us the simplified fraction 2/3.
24 ÷ 12 = 2
36 ÷ 12 = 3
Therefore, the simplified fraction of 24/36 is 2/3.
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The table shows the number of points scored by a basketball team in their first seven games.
Answer:
15
Step-by-step explanation:
the range is the largest number take away the smallest number
56-41=15
Use Matlab to plot the function f(x) = - 4x² + sin(5x) and its derivative on the same plot for x between -10 and 10, in steps of 0.5 with appropriate legend and axis labels (use a dashed red line for f(x) and a solid blue line for its derivative). The derivative of f(x) is: (-4x² + sin(57x)) = - 8x + 5π cos(5x) dx Also, create an output file named "results.txt" and write x, f(x) and its derivative into the file. Use 2 decimal places. X f(x) df/dx
To plot the function f(x) = -4x^2 + sin(5x) and its derivative, and to save the results in a file named "results.txt" with 2 decimal places.
You can use the following MATLAB code:
```matlab
x = -10:0.5:10; % Generate x values
f = -4*x.^2 + sin(5*x); % Calculate f(x)
df_dx = -8*x + 5*pi*cos(5*x); % Calculate the derivative
% Saving results to file
output = [x', f', df_dx'];
dlmwrite('results.txt', output, 'delimiter', '\t', 'precision', '%.2f');
1. First, we define the range of x values using the vector `-10:0.5:10` to cover the desired interval with a step size of 0.5.
2. Next, we calculate the values of f(x) and its derivative using the defined mathematical expressions.
3. We then plot the function and its derivative using the `plot` function. The red dashed line represents f(x), and the blue solid line represents its derivative.
4. To save the results, we create a matrix `output` that concatenates the x values, f(x), and the derivative column-wise.
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Given the expenses and income below, what is the debt-to-Income ratio? Monthly expenses: Mortgage (including all housing costs) = $1,982 Student loan = $258 Minimumcredit card payments = $184 Home equity loan = $237 Monthly income: Salary = 54,115 Bonus = $700 Side business = $1,000 Dividends/interest = $9528.3%36.1%35.5%45.0%None of these choices are correct.
The debt-to-income ratio is the division between the sum of all debts and the sum of income.
Debt: $1,982 + $258 + $184 + $237 = $2,661.
Income: $4,115 + $700 + $1,000 + $95 = $5,910.
Then,
\(r=\frac{2,661}{5,910}=0.45\)Hence, the ratio is 45%.A chemist has three different acid solutions. The first acid solution contains 15 % acid, the second contains
35 % and the third contains 65 %. He wants to use all three solutions to obtain a mixture of 72 liters containing
45% acid, using 2 times as much of the 65 % solution as the 35 % solution. How many liters of each solution
should be used?
The chemist should use
liters of 65 % solution.
liters of 15 % solution,
liters of 35 % solution
Let x, y, and z be the amounts (in liters) of the 15%, 35%, and 65% solutions, respectively.
The chemist wants to end up with 72 L of solution, so
x + y + z = 72
Now,
• x L of 15% solution contributes 0.15x L of acid
• y L of 35% solution contains 0.35y L of acid
• z L of 65% solution contains 0.65z L of acid
so that the total amount of acid in the resulting mixture is 45% of 72 L, or 32.4 L, which means
0.15x + 0.35y + 0.65z = 32.4
It's also stipulated that the chemist uses twice as much of the 65% solution as the 35% solution, which translates to
z = 2y
Substitute this into the other two equations:
x + 3y = 72
0.15x + 1.65y = 32.4
Solve for x in terms of y :
x = 72 - 3y
Solve for y :
0.15 (72 - 3y) + 1.65y = 32.4
10.8 - 0.45y + 1.65y = 32.4
1.2y = 21.6
y = 18
Solve for x and z :
x = 72 - 3 (18) = 18
z = 2 (18) = 36
So, the chemist should use
• 36 L of 65% solution (z)
• 18 L of 15% solution (x)
• 18 L of 35% solution (y)
A torus is formed when a circle of radius 3 centered at (8,0) is revolved about the y-axis a. Use the shell method to write an integral for the volume of the ton b. Use the washer method to write an integral for the volume of the torus e. Find the volume of the torus by evaluating one of the two integrats obtained in parts (a) and (). (Hint: Both integrals can be evaluated without using the Fundamental Theorems of Cabulas) a. Set up the integral that gives the volume of the torus using the shell method. Select the correct choice below and 58 in the answer boxes to complete your choice (Type exact answers) OA de 3 OF SO b. Set up the integral that gives the volume of the torus using the washer method Select the correct choice below and fill in the answer boxes to complete your choice. (Type exact answers) OAS d OB dy Time Remaining: 02:00:09 Next A torus is formed when a circle of radius 3 centered at (6,0) is revolved about the y-axis. a. Use the shell method to write an integral for the volume of the torus b. Use the washer method to write an integral for the volume of the torus. c. Find the volume of the torus by evaluating one of the two integrals obtained in parts (a) and (b). (Hint: Both integrals can be evaluated without using the Fundamental Theorem of Calculus.) у У 9- 3 X a. Set up the integral that gives the volume of the torus using the shell method. Select the correct choice below and fill in the answer boxes to complete your choice. (Type exact answers.) OAS OB. dy b. Set up the integral that gives the volume of the torus using the washer method. Select the correct choice below and fill in the answer boxes to complete your choice. (Type exact answers.) OAS dx 3 OB. dy The volume of the torus is approximately cubic units. (Round to two decimal places as needed.)
a) To find the volume of the torus using the shell method, the integral can be set up as ∫2πy(2πr)dy.
b) To find the volume of the torus using the washer method, the integral can be set up as ∫π(R²-r²)dx.
c) The volume of the torus can be found by evaluating one of the two integrals obtained in parts (a) and (b).
a) The shell method involves considering cylindrical shells with height dy and radius y. Since the torus is formed by revolving a circle of radius 3 centered at (8,0) about the y-axis, the radius of each shell is y and the height is 2πr, where r is the distance from the y-axis to the circle. Therefore, the integral to find the volume of the torus using the shell method is ∫2πy(2πr)dy.
b) The washer method involves considering infinitesimally thin washers with inner radius r and outer radius R. In the case of the torus, the inner radius is the distance from the y-axis to the circle, which is y, and the outer radius is the radius of the circle, which is 3. Therefore, the integral to find the volume of the torus using the washer method is ∫π(R²-r²)dx.
c) To find the volume of the torus, one of the two integrals obtained in parts (a) and (b) can be evaluated. The specific integral to evaluate depends on the chosen method (shell or washer). By substituting the appropriate values into the integral and evaluating it, the volume of the torus can be calculated.
Note: The specific calculations to find the volume of the torus and the corresponding numerical result were not provided in the question, so the final answer in cubic units cannot be determined without further information.
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