Tutors Answer Your Questions about Proportions (FREE)
Question 1171182: if the time (T) it takes to plant rice in an acre varies inversely as the number of the farm workers (W).
(a) if 18 workers can plant rice in a certain number of acres in 3 days, how long will it take 12 workers to plant rice in the same number of acre?
(b) what happens to the time if the number of worker decrease?
Click here to see answer by ikleyn(52781)  |
Question 1171182: if the time (T) it takes to plant rice in an acre varies inversely as the number of the farm workers (W).
(a) if 18 workers can plant rice in a certain number of acres in 3 days, how long will it take 12 workers to plant rice in the same number of acre?
(b) what happens to the time if the number of worker decrease?
Click here to see answer by josgarithmetic(39617) |
Question 1171182: if the time (T) it takes to plant rice in an acre varies inversely as the number of the farm workers (W).
(a) if 18 workers can plant rice in a certain number of acres in 3 days, how long will it take 12 workers to plant rice in the same number of acre?
(b) what happens to the time if the number of worker decrease?
Click here to see answer by greenestamps(13200)  |
Question 1172121: A telephone pole casts a shadow that is 30 feet long. At the same time, a man standing nearby who is 6 feet tall casts a shadow that is 4 feet 6 inches long. How tall is the telephone pole to the nearest foot?
When I solved this I got 40 feet. I'm not sure if that is correct, but here is the steps I took:
1. Converted 4ft into 48in by multiplying 4x12 then I added 6, Total: 54in.
2. Then I took 6x12 and got 72 and took 30x12 and got 360.
3. The proportion formula I used was height / shadow = height / shadow.
4. I plugged in the numbers 54 / 72 = x / 360 and cross multiplied and divided
5. Result, I got 480 and divided by 12 to convert back into feet since that is what the question wanted.
6. As a final answer I got 40
Click here to see answer by josgarithmetic(39617) |
Question 1172121: A telephone pole casts a shadow that is 30 feet long. At the same time, a man standing nearby who is 6 feet tall casts a shadow that is 4 feet 6 inches long. How tall is the telephone pole to the nearest foot?
When I solved this I got 40 feet. I'm not sure if that is correct, but here is the steps I took:
1. Converted 4ft into 48in by multiplying 4x12 then I added 6, Total: 54in.
2. Then I took 6x12 and got 72 and took 30x12 and got 360.
3. The proportion formula I used was height / shadow = height / shadow.
4. I plugged in the numbers 54 / 72 = x / 360 and cross multiplied and divided
5. Result, I got 480 and divided by 12 to convert back into feet since that is what the question wanted.
6. As a final answer I got 40
Click here to see answer by MathTherapy(10552)  |
Question 1172114: A telephone pole casts a shadow that is 30 feet long. At the same time, a man standing nearby who is 6 feet tall casts a shadow that is 4 feet 6 inches long. How tall is the telephone pole to the nearest foot? (1 foot = 12 inches)
Propotion: (Height / Shadow = Height / Shadow)
Click here to see answer by Boreal(15235)  |
Question 1172114: A telephone pole casts a shadow that is 30 feet long. At the same time, a man standing nearby who is 6 feet tall casts a shadow that is 4 feet 6 inches long. How tall is the telephone pole to the nearest foot? (1 foot = 12 inches)
Propotion: (Height / Shadow = Height / Shadow)
Click here to see answer by Alan3354(69443)  |
Question 1172172: I am trying to answer this practice problem from openupresources.org
A restaurant offers delivery for their pizzas. The total cost is a delivery fee added to the price of the pizzas. One customer pays $25 to have 2 pizzas delivered. Another customer pays $58 for 5 pizzas. How many pizzas are delivered to a customer who pays $80?
What are the steps to solving this problem?
docmaine@yahoo.com
Click here to see answer by Alan3354(69443)  |
Question 1172470: All the students in the sixth grade either purchased their lunch or brought their lunch from home on Monday.
• 24% of the students purchased their lunch.
• 190 students brought their lunch from home.
How many students are in the sixth grade?
(A) 76
(B) 166
(C) 214
(D) 250
Click here to see answer by ikleyn(52781)  |
Question 1172685: The pressure of the gas is directly proportional to the temperature and inversely proportional to
its volume.
A. Write the variation equation.
B. What will happen to the pressure if the volume is reduced to half and the temperature is
doubled?
Click here to see answer by Edwin McCravy(20055)  |
Question 1172719: I need help please, here is the problem:
The costs $C of making a school bag is partly constant and partly varies inversely as the total number N of bags made. When 200 bags are made, the cost per bag is $60. When 500 bags are made, the cost per bag is
$45. How many bags are made if the cost per bag is $40? Find the cost per bag if 400 bags are made.
Click here to see answer by Solver92311(821)  |
Question 1172719: I need help please, here is the problem:
The costs $C of making a school bag is partly constant and partly varies inversely as the total number N of bags made. When 200 bags are made, the cost per bag is $60. When 500 bags are made, the cost per bag is
$45. How many bags are made if the cost per bag is $40? Find the cost per bag if 400 bags are made.
Click here to see answer by Theo(13342)  |
Question 1172719: I need help please, here is the problem:
The costs $C of making a school bag is partly constant and partly varies inversely as the total number N of bags made. When 200 bags are made, the cost per bag is $60. When 500 bags are made, the cost per bag is
$45. How many bags are made if the cost per bag is $40? Find the cost per bag if 400 bags are made.
Click here to see answer by ikleyn(52781)  |
Question 1172755: Given the equation y= k pq^2/r, where k is the constant variatioin, tell which statement is true or false.
a. y and r varies directly
b. y and q^2 are directly proportional
c. y and pq^2 varies jointly
d. p and r are inversely proportional
e. y and p varies directly
Click here to see answer by ikleyn(52781)  |
Question 1173476: A concession stand at a baseball game sells 3 apples for $2.00. How can you find the cost for 10 apples?
A. Solve the proportion 3/2=x/10.
B. Solve the proportion 2/3=10/x.
C. Solve the proportion 3/2=10/x.
D. Solve the proportion 3/x=2/10.
Click here to see answer by ikleyn(52781)  |
Question 1174137: A child psychologist wants to estimate the mean age at which a child learns to talk using a confidence interval. Find the sample size necessary for a 99% confidence interval with maximum error estimate of 4 weeks for the mean age at which a child learns to talk. Assume σ = 25 weeks.
Click here to see answer by ewatrrr(24785)  |
Question 1174138: Iwas Realty is a real estate company selling homes in the Vancouver, British Columbia.
The mean number of homes sold by the company per day is 2.
a. What is the probability that the company sells exactly 3 homes tomorrow?
b. Find the probability of selling more than 2 homes on a particular day?
Click here to see answer by Boreal(15235)  |
Question 1174138: Iwas Realty is a real estate company selling homes in the Vancouver, British Columbia.
The mean number of homes sold by the company per day is 2.
a. What is the probability that the company sells exactly 3 homes tomorrow?
b. Find the probability of selling more than 2 homes on a particular day?
Click here to see answer by ewatrrr(24785)  |
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