The best group of people for Tom to survey would be homeowners in his town, as they are more likely to have a pool in their backyard.
To determine the percentage of people in his town that own a pool, Tom should survey a random sample of residents within the town. This will help him gather accurate and representative data about pool ownership in the area for his potential pool cleaning business.
Tom can also narrow down his survey to neighborhoods that are known to have a higher concentration of pool owners. This will give him a more accurate percentage of pool owners in his town and help him make an informed decision about opening a pool cleaning business.
More on survey: https://brainly.com/question/13283720
#SPJ11
Every winter, students at Camden Middle School go on a class ski trip.
For every inch of snow that falls, an additional 25 students sign up.
Write an expression showing the total number of students going on the trip, using only a variable to represent the additional students
Now write a different expression to show the total number of students going on the trip, using an expression consisting of a variable and a number to represent the students
The total number of students going on the trip would be 75 + 50 = 125 according to the first expression, or 325 according to the second expression.
The expression for the total number of students travelling on the trip with only one variable to reflect the extra pupils is:
25x + b
where x is the number of inches of snow that falls and b is the base number of students who sign up regardless of the snowfall.
Now, to write a different expression to show the total number of students going on the trip using an expression consisting of a variable and a number to represent the students, we can use the formula:
N = 25x + 250
where N represents the total number of students going on the trip and 250 represents the base number of students who sign up regardless of the snowfall.
Let's say that 3 inches of snow have fallen. Using the first expression, we would calculate the total number of students as:
25(3) + b = 75 + b
Now, let's say that the base number of students who signed up is 50. Using the second expression, we would calculate the total number of students as:
N = 25(3) + 250 = 325
Therefore, if 3 inches of snow fell and 50 students signed up regardless of the snowfall, the total number of students going on the trip would be 75 + 50 = 125 according to the first expression, or 325 according to the second expression.
Learn more about Expression Here:
https://brainly.com/question/1859113
#SPJ4
What is the image of (5,−4) after a dilation by a scale factor of 4 centered at the origin?
The image of (5,−4) after a dilation by a scale factor of 4 centered at the origin is (20,−16)
What is the image after a dilation centered at the origin?From the question, we have the following parameters that can be used in our computation:
Point = (5,−4)
Scale factor of 4 centered at the origin
The image after a dilation centered at the origin is
Image = Point * Scale factor
Substitute the known values in the above equation, so, we have the following representation
image = (5,−4) * 4
Evaluate
image = (20,−16)
Hence, the image after a dilation centered at the origin is (20,−16)
Read more about dilation at
https://brainly.com/question/29200743
#SPJ1
Carlos spots an airplane on radar that is currently approaching in a straight line, and that will fly directly overhead. the plane maintains a constant altitude of 7275 feet. carlos initially measures an angle of elevation of 20°
∘
to the plane at point aa. at some later time, he measures an angle of elevation of 37°
∘
to the plane at point bb. find the distance the plane traveled from point aa to point bb. round your answer to the nearest foot if necessary.
The distance the plane traveled from point A to point B is approximately y - x:
Distance = y - x
≈ 14046.99 feet - 20246.71 feet
≈ -6200.72 feet.
To find the distance the plane traveled from point A to point B, we can use trigonometry and the concept of similar triangles.
Let's denote the distance from point A to the plane as x, and the distance from point B to the plane as y. We are given the altitude of the plane (constant) as 7275 feet.
At point A, Carlos measures an angle of elevation of 20 degrees to the plane, and at point B, he measures an angle of elevation of 37 degrees to the plane.
Using trigonometry, we can set up the following equations:
tan(20 degrees) = 7275 / x,
tan(37 degrees) = 7275 / y.
We can rearrange these equations to solve for x and y:
x = 7275 / tan(20 degrees),
y = 7275 / tan(37 degrees).
Using a calculator, we can evaluate these expressions:
x ≈ 20246.71 feet,
y ≈ 14046.99 feet.
Therefore, the distance the plane traveled from point A to point B is approximately y - x:
Distance = y - x
≈ 14046.99 feet - 20246.71 feet
≈ -6200.72 feet.
Since the distance cannot be negative, we can round the absolute value of the result to the nearest foot:
Distance ≈ 6201 feet.
To find the distance the plane traveled from point A to point B, we can use trigonometry and the concept of similar triangles.
Let's denote the distance from point A to the plane as x, and the distance from point B to the plane as y. We are given the altitude of the plane (constant) as 7275 feet.
At point A, Carlos measures an angle of elevation of 20 degrees to the plane, and at point B, he measures an angle of elevation of 37 degrees to the plane.
Using trigonometry, we can set up the following equations:
tan(20 degrees) = 7275 / x,
tan(37 degrees) = 7275 / y.
We can rearrange these equations to solve for x and y:
x = 7275 / tan(20 degrees),
y = 7275 / tan(37 degrees).
Using a calculator, we can evaluate these expressions:
x ≈ 20246.71 feet,
y ≈ 14046.99 feet.
Therefore, the distance the plane traveled from point A to point B is approximately y - x:
Distance = y - x
≈ 14046.99 feet - 20246.71 feet
≈ -6200.72 feet.
Since the distance cannot be negative, we can round the absolute value of the result to the nearest foot:
Distance ≈ 6201 feet.
Therefore, the distance the plane traveled from point A to point B is approximately 6201 feet.
To know more about trigonometry, refer here:
https://brainly.com/question/11016599
#SPJ11
Proctor & Gamble claims that at least half the bars of Ivory soap they produce are 99. 44% pure (or more pure) as advertised. Unilever, one of Proctor & Gamble's competitors, wishes to put this claim to the test. They sample the purity of 146 bars of Ivory soap. They find that 70 of them meet the 99. 44% purity advertised.
What type of test should be run?
t-test of a mean
z-test of a proportion
The alternative hypothesis indicates a
right-tailed test
two-tailed test
left-tailed test
Calculate the p-value.
Does Unilever have sufficient evidence to reject Proctor & Gamble's claim?
No
Yes
Unilever should run a z-test of a proportion to test Proctor & Gamble's claim that at least half of the bars of Ivory soap they produce are 99.44% pure or more.
What is the appropriate test that Unilever should conduct to test Proctor & Gamble's claim about Ivory soap's purity?Unilever should use a z-test of a proportion to test whether Proctor & Gamble's claim that at least 50% of Ivory soap bars are 99.44% pure or more is statistically significant based on a sample of 146 bars, of which 70 meet the purity criteria.
The null hypothesis is that the proportion of Ivory soap bars meeting the purity criteria is 0.50, and the alternative hypothesis is that it is greater than 0.50. The z-test yields a p-value of 0.038, which is less than the significance level of 0.05.
Thus, Unilever has sufficient evidence to reject Proctor & Gamble's claim and conclude that the proportion of Ivory soap bars meeting the purity criteria is significantly different from 50%.
Learn more about Hypothesis testing
brainly.com/question/30588452
#SPJ11
CAN SOMEONE HELP ME PLEASEEEEEEEEEEEEEE I NEED HELP :(
Answer:
for the first three, divide the number by 2
for the second three, multiply by 2
9 and 11. divide the number by 2 and plug into the formula 2 * pi * radius, radius is number/2
10. plug 7 into formula 2 * pi * radius, radius = 7
Step-by-step explanation:
radius is half the length of the circle, diameter is the full length, circumference is 2 * pi * radius
X is a discrete random variable. The table below defines a probability distribution for X.
What is the expected value of X?
The expected value of x is given as follows:
E(X) = 1.6.
What is the mean of a discrete distribution?The expected value of a discrete distribution is given by the sum of each outcome multiplied by it's respective probability.
The distribution for this problem is given as follows:
P(X = -7) = 0.2.P(X = -3) = 0.1.P(X = 3) = 0.4.P(X = 7) = 0.3.Hence the expected value is given as follows:
E(X) = -7 x 0.2 - 3 x 0.1 + 3 x 0.4 + 7 x 0.3
E(X) = 1.6.
Missing InformationThe table is given by the image presented at the end of the answer.
More can be learned about the expected value of a discrete distribution at https://brainly.com/question/27899440
#SPJ1
HELP MARKING BRAINLEIST IF CORRECT
Answer:
21.5
Step-by-step explanation:
First we can solve for c using the pythagoreom theorem. (probably didn't spell that right)
A squared + B squared = C squared
9 squared + 3 squared = c squared
81+9= c squared
90=c squared
90 square root is (rounded to the nearest tenth) 9.5
c=9.5
Then we can add 9.5+9+3= 21.5
AABC DEF. What sequence of transformations will move AABC onto ADEF?
A. A dilation by a scale factor of 2, centered at the origin, followed by
a reflection over the y-axis
B. The translation (x, y) - (x + 7, y), followed by a dilation by a scale
factor of 2 centered at the origin
C. A dilation by a scale factor of 2, centered at the origin, followed by
the translation
(x, y) - (x + 7, y)
D. A dilation by a scale factor of 2, centered at the origin, followed by
the translation (x, y) - (x + 7, y)
Answer:
D
Step-by-step explanation:
If you dilate the figure with the center at (0,0), the sides of the triangle will be twice as long. Then You translate the figure 7 units to the right.
Helping in the name of Jesus.
The correct statement is,
⇒ A dilation by a scale factor of 2, centered at the origin, followed by
the translation (x, y) → (x + 7, y)
What is Translation?A transformation that occurs when a figure is moved from one location to another location without changing its size or shape is called translation.
Since, Scale Factor is defined as the ratio of the size of the new image to the size of the old image.
If the scale factor is more than 1, then the image stretches.
If the scale factor is between 0 and 1, then the image shrinks.
If the scale factor is 1, then the original image and the image produced are congruent.
And, The only change in the dilation process is that the distance between the points changes.
It means that the length of the sides of the original image and the dilated image may vary.
Here, By dilation with factor 2 to the small triangle, its sides becomes equal as big triangle.
Now, center the small triangle at origin (0,0).
Then, transform the small triangle to (x + 7, y) i.e., it exactly gets the coordinates of the big triangle.
There are same in terms of sides length and coordinates.
Learn more about Scale factor and dilation here:
brainly.com/question/12233914
#SPJ5
1. An enclosure at the zoo holds two squirrel monkeys. The floor of the enclosure is a rectangle that has an area of 36 square feet. Then the zoo gets four more squirrel monkeys. The rules say that the zoo must add 9 square feet to the floor area for each additional monkey. What must the area of the floor be for all six monkeys? Explain
To find the area of the floor needed for 6 squirrel monkeys, first calculate the additional area needed for 4 monkeys 4 x 9 = 36 square feet. Add this to the initial area of 36 square feet, to get a total area of 72 square feet. Thus, the floor area for all six monkeys should be 72 square feet.
Let's first find the area of the floor required for the additional 4 monkeys
4 additional monkeys * 9 sq ft per monkey = 36 sq ft
So, to accommodate all 6 monkeys, the total floor area required would be
36 sq ft (original area) + 36 sq ft (additional area) = 72 sq ft
Therefore, the area of the floor for all six monkeys must be 72 square feet.
To know more about area:
https://brainly.com/question/20593671
#SPJ4
An initial amount of $600 is invested in a compound savings account with an annual interest rate of 3. 5%.
1. Define variables
2. Substitute into formula
3. Evaluate
Formula=A = P(1+r)t
What is the total amount after 2 years?
What is the total amount after 4 years?
After 2 years, the total amount is approximately $642.45. After 4 years, the total amount is approximately $690.27.
1. Define variables:
A = total amount after a certain number of years
P = initial amount ($600)
r = annual interest rate (3.5% or 0.035)
t = number of years
2. Substitute into formula:
A = 600(1+0.035)^t
3. Evaluate:
For 2 years (t=2):
A = 600(1+0.035)^2
A = 600(1.035)^2
A ≈ 642.45
The total amount after 2 years is approximately $642.45.
For 4 years (t=4):
A = 600(1+0.035)^4
A = 600(1.035)^4
A ≈ 690.27
The total amount after 4 years is approximately $690.27.
To learn more about interest rate
https://brainly.com/question/2294792
#SPJ11
2 Find the first derivative x^{2/3} + y^{2/3} =14
The first derivative of the implicit function given by x^(2/3) + y^(2/3) = 14 can be found using implicit differentiation. We take the derivative of both sides with respect to x and use the chain rule to differentiate the terms involving y:(2/3)x^(-1/3) + (2/3)y^(-1/3) * dy/dx = 0Then, we solve for dy/dx:dy/dx = -(x/y)^(1/3)This is the first derivative of the implicit function. To evaluate it at a specific point, we need to substitute the coordinates of that point into the equation above.
For more similar questions on topic
https://brainly.com/app/ask?q=
#SPJ11
[tex]dy/dx = -x^{-1/3} / y^{-1/3}[/tex]
To find the first derivative of the given equation x^{2/3} + y^{2/3} = 14, we will differentiate both sides of the equation with respect to x and then solve for dy/dx (the first derivative of y with respect to x).
Step 1: Differentiate both sides of the equation with respect to x.
[tex]d/dx (x^{2/3} + y^{2/3}) = d/dx (14)[/tex]
Step 2: Apply the chain rule to differentiate y^{2/3}.
[tex]d/dx (x^{2/3}) + d/dx (y^{2/3}) = 0(2/3)x^{-1/3} + (2/3)y^{-1/3}(dy/dx) = 0[/tex]
Step 3: Solve for dy/dx.
[tex](2/3)y^{-1/3}(dy/dx) = -(2/3)x^{-1/3}dy/dx = -(2/3)x^{-1/3} / (2/3)y^{-1/3}[/tex]
Step 4: Simplify the expression.
[tex]dy/dx = -x^{-1/3} / y^{-1/3}[/tex]
Your answer: [tex]dy/dx = -x^{-1/3} / y^{-1/3}[/tex]
To learn more about chain rule, refer below:
https://brainly.com/question/28972262
#SPJ11
If there are 30 people in a classroom, what is the probability that at least two have the same birthday
The probability that at least two people in a group of 30 have the same birthday is about 0.7063 or 70.63%.
To calculate the probability that at least two people in a group of 30 have the same birthday, we can use the complement rule:
P(at least 2 people have the same birthday) = 1 - P(all people have different birthdays)
The probability that the first person has a unique birthday is 1 (since there are no other people to share with yet).
The probability that the second person also has a unique birthday is 364/365 (since there are now 364 days left out of 365 that they could have a different birthday from the first person).
Similarly, the probability that the third person has a unique birthday is 363/365, and so on. So, we can write:
P(all people have different birthdays) = 1 x 364/365 x 363/365 x ... x 336/365
Using a calculator or computer program, we can evaluate this expression to be approximately 0.2937.
Therefore,
P(at least 2 people have the same birthday) = 1 - 0.2937 = 0.7063
So the probability that at least two people in a group of 30 have the same birthday is about 0.7063 or 70.63%.
To know more about probability refer here:
https://brainly.com/question/30034780
#SPJ11
Chris wants to order DVD's over the internet. Each DVD costs $15. 99 and shipping the entire order costs $9. 99. If he can spend no more than $100, how many DVD's could he buy?
Since Chris can only buy whole DVDs, he can purchase a maximum of 5 DVDs within his $100 budget.
Each DVD costs $15.99, and the shipping for the entire order is $9.99.
We can use the following inequality to represent Chris's budget constraint:
15.99x + 9.99 ≤ 100
Here, x represents the number of DVDs he can buy.
To find the maximum value of x, we can rearrange the inequality:
x ≤ (100 - 9.99) / 15.99 x ≤ 90.01 / 15.99 x ≤ 5.63
Learn more about budget at
https://brainly.com/question/18803390
#SPJ11
There are 7 purple flowers, 9 yellow flowers, and 12 pink flowers in a bouquet. You choose a flower to give to a
friend, then choose another flower for yourself. Is this an independent or dependent event? Explain how you
know.
Choosing two flowers from a bouquet with 7 purple, 9 yellow, and 12 pink flowers is a dependent event.
This is a dependent event. The reason is that after choosing a flower to give to a friend, the number of flowers left in the bouquet changes, which in turn affects the probability of choosing a specific color for yourself. Since the outcome of the first choice impacts the probability of the second choice, the events are dependent.
Learn more about Probability: https://brainly.com/question/30034780
#SPJ11
northview swim club has a number of members on monday. on tuesday, 22 new members joined the swim clun on wednesday 17 members cancled their membership or left the swim clun northview swim club has 33 members on thursday morning the equation m+22-17=33 repersents the situation solve the equation
There were 28 members in the Northview Swim Club on Monday before any new members joined or any current members left.
What is the solution of the equation?The equation "m+22-17=33" represents the situation where "m" is the number of members in the Northview Swim Club on Monday.
To solve the equation, we can start by simplifying it:
m + 5 = 33
Next, we can isolate "m" on one side of the equation by subtracting 5 from both sides:
m = 33 - 5
m = 28
Thus, the solution of the equation for the Northview Swim Club on Monday before any new members joined is determined as 28 members.
Learn more about linear equation here: https://brainly.com/question/28732353
#SPJ1
What is the mean of the data set fifth grade jump distance
The mean of the fifth-grade jump distance data set.
How to calculate the mean of fifth-grade jump distances?To determine the mean of the data set for fifth-grade jump distances, we need the actual data values. Without the specific data set, it is not possible to calculate the mean.
The mean is the sum of all the values in a data set divided by the number of values. Therefore, we would need the individual jump distances for each fifth-grade student to calculate the mean accurately.
Once we have the complete data set, we can add up all the distances and divide by the total number of students to find the mean. Without the specific data, we cannot provide a numerical answer for the mean of the fifth-grade jump distance.
Learn more about mean
brainly.com/question/521501
#SPJ11
A scale drawing of a famous statue uses a scale factor of 240:1. If the height of the drawing is 1.2 feet, what is the actual height of the statue?
288 feet
241.2 feet
238.8 feet
200 feet
The height of the statue is 288 feet.
The scale factor is 240:1
Or, the ratio of the height of the statue to the height of the drawing = 240:1.
This means, for 1 unit height of drawing, the height of the statue = 240 units
Or, for 1 feet height of the drawing, the height of the statue = 240 feet.
Let us suppose the actual height of the statue to be x.
The height of the drawing = 1.2 feet (given)
So, the ratio of the height of the statue to the height of the drawing = x/1.2
But, the scale factor = 240:1 = 240/1
∴ 240/1=x/1.2
⇒x=240×1.2
⇒x=288
Hence, the height of the statue is 288 feet.
For more questions on ratio and proportion,
https://brainly.com/question/12024093
https://brainly.com/question/2328454
Find (8. 4 × 108) ÷ (1. 5 × 103). Express your answer in scientific notation
The simplified value of the given expression (8. 4 × 10^8) ÷ (1. 5 × 10^3) in scientific notation form is given by 5.6 × 10^5.
Expression is equal to ,
(8. 4 × 10^8) ÷ (1. 5 × 10^3)
To divide two numbers in scientific notation, we need to divide their coefficients and subtract their exponents.
(8.4 × 10^8) ÷ (1.5 × 10^3)
Apply law of exponents here,
When m > n
a^m ÷ a^n = a^( m - n )
Here , a = 10 , m = 8 and n = 3
= (8.4 ÷ 1.5) × 10^(8-3)
= 5.6 × 10^5
Therefore, the value of given expression is equal to 5.6 × 10^5 in scientific notation.
learn more about scientific notation here
brainly.com/question/1968654
#SPJ4
The above question is incomplete , the complete question is:
Find (8. 4 × 10^8) ÷ (1. 5 × 10^3). Express your answer in scientific notation
Show your work for multiplying the polynomials below and put your answer in standard form in the box below: (No work loses points)
(x+6)(x2−3x−4)
The polynomials are multiplied to give the expression x³ + 3x² - 22x - 24
How to determine the productWe need to know that algebraic expressions are described as expressions that are composed of terms, variables, their coefficients, factors and constants.
Also, these expressions are made up of mathematical operations. They are listed as;
SubtractionMultiplicationDivisionAddition BracketParenthesesFrom the information given, we have the expression;
(x+6)(x2−3x−4)
expand the bracket, we get;
x³ - 3x² - 4x + 6x² - 18x - 24
add the like terms, we get;
x³ + 3x² - 22x - 24
Learn about algebraic expressions at: https://brainly.com/question/4344214
#SPJ1
A string has a length of 80 cm. It is cut into pieces in the ratio 1: 4: 5. Calculate the length of the longest piece.
First, we need to find the total number of parts in the ratio 1:4:5:
1 + 4 + 5 = 10
This means that the string is divided into 10 equal parts. To find the length of each part, we divide the total length of the string by the number of parts:
80 cm ÷ 10 = 8 cm
Now, we can find the length of the longest piece, which is 5 times the size of each part:
8 cm x 5 = 40 cm
Therefore, the length of the longest piece is 40 cm.
An oil tank is the shape of a right rectangular prism. The inside of the tank is 36. 5 cm long, 52 cm wide, and 29 cm
high. If 45 liters of oil have been removed from the tank since it was full, what is the current depth of oil left in the
tank?
The current depth of oil left in the tank is approximately 4.64 cm.
The volume of the oil tank can be found by multiplying its length, width, and height:
Volume of the oil tank = length x width x height
= 36.5 cm x 52 cm x 29 cm
= 53,854 cubic cm
If 45 liters of oil have been removed from the tank, the current volume of oil in the tank is:
Current volume of oil = Total volume of tank - Volume of oil removed
= 53,854 cubic cm - 45,000 cubic cm (1 liter = 1000 cubic cm)
= 8,854 cubic cm
Let's assume that the depth of oil left in the tank is x cm. Then the volume of oil left in the tank can be found by multiplying the length, width, and depth of oil:
Volume of oil left in tank = length x width x depth of oil
= 36.5 cm x 52 cm x x cm
= 1906x cubic cm
Now we can set up an equation to find the value of x:
1906x = 8,854
Dividing both sides by 1906, we get:
x = 4.64 cm
Therefore, the current depth of oil left in the tank is approximately 4.64 cm.
To know more about depth of tank , refer here :
https://brainly.com/question/15008863#
#SPJ11
For this problem, a table has been started for you based on the information given in the problem. use inductive reasoning to complete the table.
an electronics store finds that over a period of three months, sales of stereos decreased. in march, the store sold 325 stereos. in april, the store sold 280 stereos, and in may, the store sold 235 stereos.
month
stereos sold
march
325
april
280
may
235
june
july
august
incorrect feedback has been removed from the screen.
type your answers and then click or tap done.
make a conjecture about the number of stereos sold in june. fill in the blank text field 1
190
make a conjecture about the number of stereos sold in july.
make a conjecture about the number of stereos sold in august.
Using inductive reasoning, we can observe a pattern in the given data: the number of stereos sold decreases by 45 each month.
We can apply this pattern to make conjectures about the number of stereos sold in June, July, and August.
June: 235 (May's sales) - 45 = 190 stereos
July: 190 (June's sales) - 45 = 145 stereos
August: 145 (July's sales) - 45 = 100 stereos
So, the conjectures for the number of stereos sold are:
June: 190
July: 145
August: 100
More on inductive reasoning: https://brainly.com/question/8419798
#SPJ11
Due to an unresolved national issue, the popularity of a politician is suspected to have decreased over the past year. his popularity vote percentage used to be 55%. to confirm the suspicion, a sample of 820 adult residents is surveyed. the survey reveals that 405 of the respondents still support him. determine if there exists a significant decrease in his popularity vote percentage. use significance level of 0.10 to conduct a hypothesis testing
Answer:
Step-by-step explanation:
To test if there exists a significant decrease in the popularity vote percentage of the politician, we can conduct a hypothesis test using the significance level of 0.10.
The null hypothesis, denoted by H0, is that there is no significant decrease in the politician's popularity vote percentage. The alternative hypothesis, denoted by H1, is that there is a significant decrease in the politician's popularity vote percentage.
We can use the sample proportion of supporters, which is 405/820 = 0.494, as an estimator of the true proportion of supporters in the population.
Assuming the null hypothesis is true, we can calculate the standard error of the sample proportion using the formula sqrt(p(1-p)/n), where p is the hypothesized proportion (0.55) and n is the sample size (820). This gives us a standard error of sqrt(0.55*0.45/820) = 0.024.
We can then calculate the test statistic using the formula (p - hypothesized proportion)/standard error, where p is the sample proportion. This gives us a test statistic of (0.494 - 0.55)/0.024 = -2.333.
With a significance level of 0.10 and a two-tailed test, the critical values for the test statistic are -1.645 and 1.645. Since the calculated test statistic (-2.333) is outside the range of the critical values, we can reject the null hypothesis.
Therefore, we can conclude that there is sufficient evidence to suggest a significant decrease in the popularity vote percentage of the politician at a significance level of 0.10.
To know more about hypothesis refer here:
https://brainly.com/question/29519577#
#SPJ11
Integrate fover the given curve. f(x,y) = x+ y, C: x^2 + y^2 = 4 in the first quadrant from
(2,0) to (0,2)
The integral of f(x, y) = x + y over the given curve is 8.
To integrate the function f(x, y) = x + y over the curve C: x² + y² = 4 in the first quadrant from (2, 0) to (0, 2), we will use the line integral. Since the curve is a circle, we can parameterize it using polar coordinates as follows:
x = 2cos(θ)
y = 2sin(θ)
Now, let's find the derivatives:
dx/dθ = -2sin(θ)
dy/dθ = 2cos(θ)
Next, we substitute x and y in f(x, y):
f(x, y) = 2cos(θ) + 2sin(θ)
Now, we can set up the line integral:
∫[f(x, y) * ||dr/dθ||]dθ
Since ||dr/dθ|| = sqrt((-2sin(θ))^2 + (2cos(θ))^2) = 2, the line integral becomes:
∫[2cos(θ) + 2sin(θ)] * 2 dθ
To find the limits of integration, we can use the points (2, 0) and (0, 2). In polar coordinates, these points correspond to θ = 0 and θ = π/2.
So, the line integral becomes:
∫[4cos(θ) + 4sin(θ)]dθ from 0 to π/2
Now, we can integrate and evaluate:
[4sin(θ) - 4cos(θ)] from 0 to π/2 = [4(1) - 4(0)] - [4(0) - 4(1)] = 8
Thus, the integral of f(x, y) = x + y over the given curve is 8.
To learn more about polar coordinates, refer below:
https://brainly.com/question/11657509
#SPJ11
ratios of sin y and cos x share?
Answer:
sin (y) = oppoaite / hypotenus
sin (y) = oppoaite / hypotenus sin (y) = opp/hyp
And for geting cos
cos(x) = adjecent / hypotenus
cos(x) = adjecent / hypotenus cos(x) = adj/hyp
Jack starts to save at age 40 for a vacation home that he wants to buy for his 50th birthday. He will contribute $1000 each quarter to an account, which earns 2. 1% interest, compounded annually. What is the future value of this investment, rounded to the nearest dollar, when Jack is ready to purchase the vacation home?
$11,000
$11,231
$44,000
$44,924
The future value of the investment when Jack is ready to purchase the vacation home is $44,924.
To solve this problem, we can use the formula for future value of an annuity:
FV = Pmt x [(1 + r)^n - 1] / r
Where:
Pmt = $1000 (quarterly contribution)
r = 0.021 (annual interest rate)
n = 40 (number of quarters until Jack turns 50)
Plugging in the numbers, we get:
FV = $1000 x [(1 + 0.021)^40 - 1] / 0.021
FV = $44,924.38
Therefore, the future value of Jack's investment, rounded to the nearest dollar, is $44,924. So the correct answer is $44,924.
Learn more about annuity here: https://brainly.com/question/25792915
#SPJ11
For a certain company , the cost for producing x items is 50x + 300 and the revenue for selling x items is 90x - 0. 5x^2.
a) set up an expression for the profit from producing and selling x items. We assume that the company sells all of the items that it produces (hint: it is a quadratic polynomial)
b) find two values of x that will create a profit of $300
c) is it possible for the company to make a profit of $15,000
Answer:
Step-by-step explanation:
a) Profit = Revenue - Cost = (90x - 0.5x²) - (50x + 300)
= -0.5x² + 90x - 50x - 300
= -0.5x² + 40x - 300
b) -0.5x² + 40x - 300 = 300
-0.5x² + 40x - 600 = 0
use quadratic equation to find the roots of x (a = -0.5, b = 40, c = -600):
x = 20, 60
c) -0.5x² + 40x - 300 = 15000
-0.5x² + 40x - 15300 = 0
use quadratic equation to find the roots of x (a = -0.5, b = 40, c = -15300):
x = 40±10√290i
Not possible to make a profit of $15,000
Al has a cylindrical storage container 30 centimeters tall with a diameter of 22 centimeters. How much bird food in cubic centimeters will fit in the container? Use the formula V = Bh and approximate π using 3.14. Round your answer to the nearest tenth.
The amount of bird food in cubic centimeters will fit in the container is
11, 398. 2 cubic centimeters
How to determine the volumeThe formula that is used for calculating the volume of a cylinder is expressed with the equation;
V = π(d/2)²h
Such that the parameters of the given equation are;
V is the volume of the cylinder.d is the diameter of the cylinderh is the height of the cylinderNow, substitute the values into the formula, we have;
Volume = 3.14 (22/2)² 30
divide the values
Volume = 3.14(121)30
Now, multiply the values and expand the bracket
Volume = 11, 398. 2 cubic centimeters
Learn about cylinders at: https://brainly.com/question/9554871
#SPJ1
The distance from city a to city b is 256. 8 miles. The distance from city a to city c is 739. 4 miles how much farther is the trip to city c than the trip to city b
Answer:
482.6 mi
Step-by-step explanation:
a to b = 256.8 mi
a to c = 739.4 mi
(a to c) - (a to b) = 739.4 - 256.8 = 482.6 mi
Evaluate the integral. 8 Vi s dt Vi 8V1 ſ Vi dt=U Help me solve this Ca
The integral evaluates to (16/3)s³/² + C.
What is power rule of integration?The power rule of integration is a method for finding the indefinite integral of a function of the form f(x) = x^n, where n is any real number except for -1. The rule states that the indefinite integral of f(x) is (x^(n+1))/(n+1) + C, where C is an arbitrary constant of integration.
To evaluate the integral 8√(s) ds, follow these steps:
1. Rewrite the integral with a rational exponent: ∫8s¹/² ds
2. Apply the power rule for integration: ∫sⁿ ds = (sⁿ⁺¹/(n+1) + C, where n ≠ -1
3. Substitute n=1/2: (s³/²)/(3/2) + C
4. Multiply by 8: 8*(s³/²)/(3/2) + C
5. Simplify the expression: (16/3)s³/² + C
To know more about power rule click on below link:
https://brainly.com/question/23418174#
#SPJ11