Answer
$=49$
Work Step by Step
Using the fact that $a^{-b}=\frac{1}{a^b}$, the expression becomes $$\frac{1}{7^{-2}}=\frac{1}{\frac{1}{7^2}}=7^2=49$$
Functions Modeling Change: A Preparation for Calculus, 5th Edition
by Connally, Eric; Hughes-Hallett, Deborah; Gleason, Andrew M.; Cheifetz, Phil C.
Published by
Wiley
ISBN 10:
1118583191
ISBN 13:
978-1-11858-319-7
Chapter 4 - Exponential Functions - Exercises to Skills for Chapter 4 - Page 185: 12
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