Basic College Mathematics (10th Edition)

Published by Pearson
ISBN 10: 0134467795
ISBN 13: 978-0-13446-779-5

Chapter 7 - Measurement - 7.1 Problem Solving with U.S. Measurement Units - 7.1 Exercises - Page 483: 23


1.5 hr

Work Step by Step

90 min = hr Use a unit fraction with hour (the unit for your answer) in the numerator, and minute (the unit being changed) in the denominator. Because 60 minute (min) = 1 hour (hr), the necessary unit fraction is (1 hour)/(60 minute) Multiply 90 times the unit fraction. 90 * (1 hour)/(60 minute) = 3/2 hr= 1.5 hr
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