224 Answered Questions for the topic Proportions

04/11/16

help with question

A person claims to be able to predict the outcome of flipping a coin. This person is correct 16/25 times. Compute the 95% confidence interval on the proportion of times this person can predict coin... more

03/15/16

after flying at an altitude of 500 meters, a helicopter starts to descend

after flying at an altitude of 500 meters, a helicopter starts to descend when its ground distance from landing pad is 11 kilometers. What is the angle of depression for this part of the flight?

03/01/16

Help with a word problem (ratios)?

On my Yahoo email account, for every 20 emails I receive, 4 are spam. I only look at 2 out of every 17 spam emails that I receive. If I looked at 10 spam emails last month, how many total emails... more

02/27/16

Write a proportion that can be used to find x, the number of people who rode the coaster during a 12-hour period, if the rate is the same.

During a 3-hour period, 2,292 people rode the roller coaster at an amusement park. Write a proportion that can be used to find x, the number of people who rode the coaster during a 12-hour period,... more

02/24/16

make these fraction into proportions , and do somethig nwith the 35

I don't really understand how to do proportions , need help on that!

02/21/16

Proportion word problem

For a fixed voltage, the current in an electrical circuit varies inversely with the resistance in the current. If a certain circuit has a current of 2.5 amps when the resistance is 150 ohms, find... more

02/21/16

If you can but 12 bulbs of garlic for $4.68, then how many can you buy with $2.34?

12 = 4.68  n = 2.34

02/17/16

are there any tricks to proportions?

Like is there easy ways to do it and if so how

02/04/16

A 16GB iPod can hold 20 hours of music. How many can a 20GB iPod hold

It has to do with proportions and I need help solving it

02/03/16

Elise can read 22 pages in 30 minutes. Sue takes 28 minutes to read 42 pages. Who reads faster?

Elise can read 22 pages in 30 minutes and Sue takes 28 minutes to read 42 pages.  Who reads faster?

02/01/16

there are 16 animals on a farm 3/8 are horses and 1/4 are donkeys the rest are mules. How many horses,donkeys and mules are on the farm

Is there 16 students on the farm are there enough horses for all 16 students.

02/01/16

Betty makes pies. To make 6 pies, she uses 7 1/2 cups of flour. How many cups of flour are needed to make 1 pies?

Betty makes pies. To make 6 pies, she uses 7 1/2 cups of flour. How many cups of flour are needed to make 1 pies?  

01/31/16

John Swam 1/4 of a mile in 6 minutes. Sherry swam 5/8 of a mile in 3 minutes. Who swam farther in one minute?

a). John swam ______ of a mile in one minute.   b). Sherry swam _____ of a mile in one minute.   c). ______ swam farther in one minute

01/28/16

I need solving this

Nautical speed was once measured by throwing a rope into the water from the ship. The rope had knots every 47 ft 3 in, and its wedge-shaped end would "grab" the water. The speed was the number of... more

01/22/16

Is 5 to 4 and 35 to 28 is an equivalent proportion

5 to 4 and 35 to 28 proportion  

01/13/16

The perimeter of a rectangle is 220 inches. The ratio of length to width is 7:3. Find the areattached of the rectangle.

It has the perimeter of the rectangle but that is two times area.  P= 2 (l×w). Area must be found but I don't understand how. With the ratio I don't know how to get the area from that at all. I... more

01/08/16

After becoming an adult at 18, Jack spend a tenth of his life as an unmarried man

After becoming an adult at 18, Jack spend a tenth of his life as an unmarried man. He then got married and had his first child three years into his marriage. If he spends 2/3 of his life as a... more

01/07/16

Percentage Question

you are making cupcakes for bake sale. 24 are vanilla, 36 chocolate. you want chocolate cupcakes to make up 70 percent of total number of cupcakes. Write and solve proportion to find number of... more
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