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: 17


The lower unit cost is $0.913/ounce so the best buy is the 4 ounce container.

Work Step by Step

$\frac{\$ 2.25}{2 ounce}$ = $\frac{\$ 2.25\div2}{2\div2 ounce}$ = $\frac{\$ 1.125}{1 ounce}$ = $\$1.125/ounce$ $\frac{\$ 3.65}{4 ounce}$ = $\frac{\$ 3.65\div4}{4\div4 ounce}$ = $\frac{\$ 0.9125}{1 ounce}$ = $\$0.913/ounce$
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