Answer
.08 dollars per MB
Work Step by Step
We find the additional number of MB used:
$$ =3 \times 30 =90 \ MB$$
Thus, the additional charge is:
$$ =90\times 1.5 =135$$
Thus, the cost per MB is:
$$ = \frac{60+135}{2590} \\ = .08$$
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: 40
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