Answer
The answer is $\frac{25}{81}$.
Work Step by Step
The expression $r^{-4}$$\times$$s^{2}$ can be rewritten as $\frac{s^{2}}{r^{4}}$.
We plug in r=-3 and s=5
$\frac{s^{2}}{r^{4}}$. = $\frac{(5)^{2}}{(-3)^{4}}$ = $\frac{25}{81}$.
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281140
ISBN 13:
978-0-13328-114-9
Chapter 7 - Exponents and Exponential Functions - 7-1 Zero and Negative Exponents - Practice and Problem-Solving Exercises - Page 422: 43
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