Basic College Mathematics (9th Edition)

Published by Pearson
ISBN 10: 0321825535
ISBN 13: 978-0-32182-553-7

Chapter 7 - Measurement - 7.1 Problem Solving with U.S. Measurement Units - 7.1 Exercises - Page 486: 44

Answer

80 cups.

Work Step by Step

5 gal = c Use the unit fraction $\frac{4 quarts}{1 gal}$ to change gallon to quarts, next use the unit fraction $\frac{2 pint}{1 quart}$ to change quart to pint and last use the unit fraction $\frac{2 cup}{1 pint}$ to change pint to cup. Notice how all the units divide out except cup, which is the unit you want in the answer. 5 gal * $\frac{4 quarts}{1 gal}$ * $\frac{2 pint}{1 quart}$* $\frac{2 cup}{1 pint}$= 80 cups.
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