Basic College Mathematics (10th Edition)

Published by Pearson
ISBN 10:
ISBN 13:

Chapter 5 - Ratio and Proportion - 5.5 Solving Application Problems with Proportions - 5.5 Exercises - Page 363: 3


22.5 hours

Work Step by Step

$\frac{4 strips}{5 hours}$=$\frac{18 strips}{x hours}$ 4x=18(5) 4x=90 x=22.5 hours
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