Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 7 - Exponents and Exponential Functions - 7-1 Zero and Negative Exponents - Practice and Problem-Solving Exercises - Page 422: 42



Work Step by Step

We follow the instructions and plug -3 in for r and 5 in for s. This leaves us with the expression: $-3^{0} \times 5^{-2}$ Recall the equation: $a^{-n}= \frac{1}{a^{n}}$. Also, remember that anything raised to the zeroth power is 1. Thus, this expression simplifies to: $1/ 5^{2}= 1/25$
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