# Chapter 7 - Exponents and Exponential Functions - 7-1 Zero and Negative Exponents - Practice and Problem-Solving Exercises - Page 422: 41

4/5

#### Work Step by Step

We follow the instructions and plug 5 in for s. This leaves us with the expression: $4\times5^{-1}$ Recall the equation: $a^{-n}= \frac{1}{a^{n}}$. Thus, we simplify this expression: $4\times5^{-1}=4/5$

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