# Chapter 7 - Exponents and Exponential Functions - 7-6 Exponential Functions - Practice and Problem-Solving Exercises - Page 457: 19

4800 foxes

#### Work Step by Step

You have f(x)=75 $\times$ $4^{x}$.Where it represents the number of foxes after 15-year periods. Plug in x=3 since there are 3 15-year periods in 45 years. f(3)=75 $\times$ $4^{3}$ f(3)=4800 After 45 years, there would be 4800 foxes.

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