#### Answer

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#### Work Step by Step

The whole expression $(\frac{r^{-7}b^{-8}}{w ^{ 1}t^{-4}})^{0}$ = 1 because any expression or variable with the exponent of 0 becomes 1.

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Published by
Prentice Hall

ISBN 10:
0133281140

ISBN 13:
978-0-13328-114-9

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