Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 2 - Section 2.7 - Combining Functions - 2.7 Exercises - Page 217: 75

Answer

With $f(x)=0.15-0.000002x$, and $g(x)=x$, $R(x)$ can be expressed as $R(x)=f(x)\cdot g(x)$ (a product of two functions of x)

Work Step by Step

"Price per item" is a function of x items : $f(x)=0.15-0.000002x$ "Number of items sold" is a function of x items : $g(x)=x$ So, $R(x)=f(x)\cdot g(x)$ $=(0.15-0.000002x)\cdot x$
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