Question

7 th Grade Accelerated Math Nine Weeks Test Rebecca ran 21 miles in 5 hours. If she ran at a constant speed, how many miles did she run in 2 hours?

A)8.4 miles
B) 42 miles
C) 4.2 miles
D) 1.2 miles

Answer 1

Rebecca ran 8.4 miles in 2 hours.

Step-by-step explanation:

To find the number of miles Rebecca ran in 2 hours, we can use the concept of rate. Rate is a measure of how fast an object is moving. In this case, Rebecca ran 21 miles in 5 hours, so her rate is 21 miles divided by 5 hours, which is 4.2 miles per hour.

Now, to find the number of miles she ran in 2 hours, we can multiply her rate by the number of hours. So, 4.2 miles per hour multiplied by 2 hours equals 8.4 miles.

Therefore, Rebecca ran 8.4 miles in 2 hours.