Tutors Answer Your Questions about Proportions (FREE)
Question 192128: For a certain time period the ratio of the dollar value of exports to the dollar value of imports for the United States was 2 to 3. If the value of exports during that time period was 48 billion dollars, then what was the value of imports?
Click here to see answer by edjones(7569)   |
Question 192820: the amount of material needed to cover a ball is directly proportional to the square of its diameter. a ball with a diameter of 12 cm needs 452 cm(squared) of materail to cover it. if 1017 cm(squared) of material is to be used what is the diameter of the ball.
Click here to see answer by Mathtut(3670) |
Question 193451: Respected sir,
[1] Rs.1980 are divided among A,B,C so that half of A's part ,one-third of B's part and one-sixth of C's part are equal.Then , B's part is ?
plz help me to solve ratio ,proportions maths problem.waiitng for yur reply.
thank u sir.
regards.
Binita
Click here to see answer by RAY100(1637) |
Question 193450: Respected sir,
[1] 94 is divided in to two parts in such a way that the fifth part of the first and the eighth part of the second are in the ratio 3:4,the first part is ?
[2] Rs.1980 are divided among A,B,C so that half of A's part ,one-third of B's part and one-sixth of C's part are equal.Then , B's part is ?
plz solve my ratio ,proportion difficualty .waiting for yur reply.
thank you sir.
Regards.
Binita.
Click here to see answer by solver91311(17077)  |
Question 193450: Respected sir,
[1] 94 is divided in to two parts in such a way that the fifth part of the first and the eighth part of the second are in the ratio 3:4,the first part is ?
[2] Rs.1980 are divided among A,B,C so that half of A's part ,one-third of B's part and one-sixth of C's part are equal.Then , B's part is ?
plz solve my ratio ,proportion difficualty .waiting for yur reply.
thank you sir.
Regards.
Binita.
Click here to see answer by edjones(7569) |
Question 195247: Employees of a discount appliance store receive an additional 20% off of the lowest price on an item. If an employee purchases a dishwasher during a 15% off sale, how much will he pay if the dishwasher originally cost $450?
Click here to see answer by Mathtut(3670) |
Question 196973: The distance traveled at a constant speed is directly proportional to the time of travel. If Olivia traveled 112 miles in 3.5 hours, how many miles will Olivia travel in 8.9 hours at the same constant speed?
Click here to see answer by stanbon(57967) |
Question 197598: Respected sir & madum,
1] find the ratio of x:y:z,from the following equation :
x-2y+z=0 .....(1)
3x+2y-3z=0....(2)
2]solve the following simultaneous equatins by cross multiplication method
5x-3y=1 ..... (1)
x+2y=12......(2)
plz solve my difficulty as soon an possible...need simple explaination.
regards.
Binita.
Click here to see answer by stanbon(57967) |
Question 197916: Hello!
I need help in proportions. i don't understand it at all. i Basicly need hep in probability im not good at outcome(events). Please teach me how.
THANK-YOU VERY MUCH (TYVM)
Sincerely,
George
Click here to see answer by Ratman99(5) |
Question 198121: Lance wanted to see how long it would take to ride 100 miles. After 2 hours of riding, he had only gone 30 miles. He increased his speed by 5 mi/h and maintained that pace for the rest of the trip. How long did it take Lance to ride 100 miles?
What I've done so far: I took the 30 miles divided it by 2 hours; got that he's traveling at 15 mi/h. I then took the 15 mi/h and added 5 mi/h; to get 20 mi/h that he'll travel for the rest of the trip. Then here's where I get confused, I used the formula time = distance over time. which would be time = 70 mi. left over 20 mi/h. I came up with 3.5 hours to ride the remaining 70 miles. I then would add 2 hours with the 3.5 hours to get 5.5 hours. It would take Lance 5.5 hours to ride 100 miles. Is this correct?
Click here to see answer by vleith(2825) |
Question 198126: The turtle and the hare have a race that is 1 mile long. The turtle plods along steadily so that he will finish in 3 hours. The hare take a nap at the starting line for 2.8 hours, wakes up, and hops hurriedly to catch the turtle. How fast will the hare have to hop, to tie the race? This is what I've got so far:
I took the 3 hours that it will take the turtle and subtracted the 2.8 hours that the hare was sleeping, I came up with .2 hours that the hare has left to tie the race. I then used the formula speed = distance over time; which gave me 1 mile over .2 hours which would equal 5 mi/h. The hare would have to travel 5 mi/h to tie the turtle.
Click here to see answer by Earlsdon(6294) |
Question 198136: Miguel walks 3 kilometers to school in 40 minutes. On Saturday he plans to walk to a friend's house which is 1 kilometer past school. How long will it take him to walk to his friend's house? This is what I have:
I took 40 minutes divided it by 3 kilometers to find that it's taking him 13.3 min. to walk one kilometer. I then multiplied that by the 4 total kilometers he would walk to his friend's house and I came up with 53.3 min. So it would take Miguel 53 min. to walk to his friend's house, is this correct?
Click here to see answer by arallie(162) |
Question 198129: It took Keiko 15 minutes to walk 1 mile to the store. Then she walked 2 more miles from the store to the beach it took her 45 minutes. What was her average speed in miles per hour? This is what I did:
I added the 15 min. and 45 min. and got that she walked 3 miles in 1 hour.
You would then use the formula for speed. Speed = 3 miles over 1 hour.
Keiko average speed was 3 mi/h.
Click here to see answer by arallie(162) |
Question 198123: A long distance runner completes the first half of a 26 mile marathon in 2 hours. How fast will she have to run the rest of the race in order to finish in 5 hours total? Ok this is what I have done so far:
I took the 26 miles divided it in half to find that she traveled 13 miles in 2 hours. I then used the formula speed = distance over time. She has to run 13 miles left to run divided by the 3 hours she has left. I came up with 4.3 mi/h.
Click here to see answer by arallie(162) |
Question 198425: A man mixes peanuts selling at 40 cents a pound with cashew nuts selling at 70 cents a pound to make a 50-pound mixture which he sells at 52 cents a pound. How many pounds of each kind of nuts must he mix?(Only an algebraic solution will be accepted.)
Click here to see answer by nerdybill(7008)  |
Question 199468: Mrs Lim has sponsored a total of 105 hot dogs and 126 cans of fruit juice for the refreshment of a classic picnic . Each student will receive the same amount of refreshment .
a) what is the greatest number of students who will get the refreshment ?
b) how many hot dogs will each student get?
c) how many cans of fruit juice will each receive?
Click here to see answer by edjones(7569) |
Question 199917: A recent magazine article indicated that 47% of the general consumer population in the United States is loyal to the automobile manufacturer of their choice. Suppose Chevrolet did a study of a random sample of 1006 Chevrolet owners and found that 490 said that they would buy another Chevrolet.
Does this indicate that the population proportion of consumers loyal to Chevrolet is more than 47%??
Use level of significance of 0.01
Click here to see answer by ALG1(2) |
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