Basic College Mathematics (10th Edition)

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

Chapter 5 - Ratio and Proportion - 5.2 Rates - 5.2 Exercises - Page 344: 21


Lower unit cost is $0.099/oz, so the best buy is the 18 oz jar of peanut butter.

Work Step by Step

$\frac{1.29}{12 oz}$ = 0.108/oz $\frac{1.79}{18 oz}$ = 0.099/oz $\frac{3.39}{28 oz}$ = 0.121/oz $\frac{4.39}{40 oz}$ = 0.110/oz
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.