Aliza needs to run at a rate faster than 8.2 feet per second in order to exceed her fastest time in a race. After
running for 15 minutes, her coach determines that she is
running at an average rate of 5.8 miles per hour. He
converts the average rate to feet per second as shown
below:
5.8 mi
1 min
= 34.0
1h
15 min
1 mi
60 s
S
He concludes that she is not running fast enough to
exceed her fastest time.