Idecided to exercise by running 5 miles. it took me 30 minutes. we can use this information to calculate my

We can use this information to calculate the rate or speed the person was traveling at

With distance = rate * time we can figure out his rate or speed.

Plug in variables: 5 miles = 30 minutes * r

First convert 30 minutes into an hour. Which is easy. It's 1/2 an hour.

5 miles = 1/2 hour * r

Divide both sides by 1/2 hour.

5 miles / 1/2 hour = (1/2 hour * r) / 1/2 hour

10 miles per hour = r
Then switch around.

r = 10 miles per hour

The correct answer is b