## Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson

# Chapter 4 - Exponential and Logarithmic Functions - Section 4.1 Composite Functions - 4.1 Assess Your Understanding - Page 280: 69

#### Answer

$C(N)=15000+800,000t-40000t^2$

#### Work Step by Step

We have: $N(t)=100t-5t^2$ and $c(N)=15000+8000N$ Therefore, the composite function will be: $C(N)=C[N(t)]=C(t) \\ =15000+8000N \\ =15000+8000(100t-5t^2) \\=15000+800,000t-40000t^2$

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