Answer
$ \frac{9}{16}$
Work Step by Step
$(-\frac{64}{27})^{-2/3}=(-\frac{4^3}{3^3})^{-2/3}=(-\frac{4}{3})^{-2}=(-\frac{3}{4})^{2}=\frac{9}{16}$
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter R - Review of Basic Concepts - Test - Page 86: 30
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