Answer
9
Work Step by Step
Recall, when a number is raised to the second power, the square root cancels out the exponent. Thus, we obtain:
$\sqrt{81}=\sqrt{9^{2}}=9$
Elementary Algebra
by Kaufmann, Jerome; Schwitters, Karen;
Published by
Cengage Learning
ISBN 10:
1285194055
ISBN 13:
978-1-28519-405-9
Chapter 11 - Additional Topics - 11.3 - Fractional Exponents - Problem Set 11.3 - Page 489: 1
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