Answer
$9$
Work Step by Step
$81=3^{4}$
$\sqrt[2]{81}= \sqrt[2]{3^{4}}\qquad$... Apply: $\sqrt[n]{a^{m}}=a^{m/n}$
$=3^{4/2}$
$=3^{2}$
$=9$
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 - 7-5 Rational Exponents and Radicals - Practice and Problem-Solving Exercises - Page 450: 14
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