Answer
True
Work Step by Step
$9^{-\frac{1}{2}}=\frac{1}{(9)^{\frac{1}{2}}}=\frac{1}{\sqrt 9}=\frac{1}{3}$ $\frac{1}{3}$ is greater than 0, so it is a positive number We know that $\sqrt 9=3$, because $3^{2}=9$
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 7 - Section 7.2 - Rational Exponents - Vocabulary, Readiness & Video Check - Page 423: 1
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