Answer
The sales tax rate is 5%.
Work Step by Step
We are told that the sales tax on a purchase of $\$155.94$ is $\$7.80$. We find the percent tax rate:
$155.95*x=7.80$
$x=7.80/155.95=0.05=5\%$
Thus the sales tax rate is 5%.
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 6 - Percent - 6.6 Solving Application Problems with Percent - 6.6 Exercises - Page 440: 32
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