Determine the unit rate of a marathon runner who travels 15/2 miles in 1/4 hour

Your answer will be 15/2 miles

Hi there.

First, let's convert the improper fraction to a mixed number. Then we'll find out how much 1/4 of an hour actually is.

15/2 = 7 1/2

1/4 of 60 = 15

So far, the marathon runner can run 7 1/2 miles in 15 minutes.

To find the unit rate, we multiply both by 4.

7 • 4 = 28

1/2 • 1/2 = 2

Add these and you'll get 30.

15 minutes • 4 = 60

The unit rate is:

30 miles per hour (not sure how to write this using miles)