Basic College Mathematics (10th Edition)

Published by Pearson
ISBN 10:
ISBN 13:

Chapter 5 - Ratio and Proportion - 5.2 Rates - 5.2 Exercises - Page 344: 18

Answer

Lower unit cost is $0.449/oz, so the best buy is the 8oz bottle of shampoo.

Work Step by Step

$\frac{3.59}{8 oz}$ = 0.449/oz $\frac{5.54}{12 oz}$ = 0.462/oz
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