Answer
$\left(7^{-4}\right)^{-5}=7^{20}$
Work Step by Step
RECALL:
The power rule of exponents states that: $\left(a^{m}\right)^n=a^{mn}$
Use the power rule to find:
$\left(7^{-4}\right)^{-5}=7^{-4(-5)}=7^{20}$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 1 - Section 1.6 - Properties of Integral Exponents - Exercise Set - Page 79: 57
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