Basic College Mathematics (10th Edition)

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

Chapter 5 - Ratio and Proportion - Summary Exercises - Ratio, Rates and Proportions - Page 359: 12


Brand P has the lowest price per pound of cat food ($\$0.57/pound$).

Work Step by Step

We calculate the cost of cat food per pound for each brand: Brand N: $\$3.75$, $\$1$ off: $\$3.75-\$1.00=\$2.75$ $\$2.75$ for $3.5$ pounds: $\$2.75\div 3.5\approx\$0.79/pound$ Brand P: $\$5.99$, $\$2$ off: $\$5.99-\$2.00=\$3.99$ $\$3.99$ for $7$ pounds: $\$3.99\div 7\approx\$0.57/pound$ Brand R: $\$10.79$ for $18$ pounds: $\$10.79\div 18\approx\$0.60/pound$ We see that Brand P comes out the cheapest.
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