Answer
Plan A
Work Step by Step
For Plan A, the cost would be:
$$=45 + 30 \\ =75$$
For Plan B, the cost would be:
$$ =30+ (25)(5) \\ =155$$
For Plan C, the cost would be:
$$ =60+(1.5)(500) \\ = 810$$
Thus, Plan A is the best option.
Basic College Mathematics (10th Edition)
by Lial, Margaret L.; Salzman, Stanley A.; Hestwood, Diana L.
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 346: 42
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