Answer
$r^{20}$
Work Step by Step
We start with the given expression: $(r^{-5})^{-4}$
To raise a power to a power, we multiply the exponents:
$r^{-5\times-4}=r^{20}$
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 7 - Exponents and Exponential Functions - Mid-Chapter Quiz - Page 439: 2
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