Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 2 - Solving Equations - Concept Byte - Page 123: 21


56.25 minutes

Work Step by Step

The racetrack is 2.5 miles long. The race had 30 cautionary laps. The cautionary race was a total of $2.5*30=75$ miles. The speed is 80 miles per hour. So $ \frac{75}{80}=0.9375$ hours. In minutes, $0.9375*60=56.25$ minutes
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