Calculus 8th Edition

Published by Cengage
ISBN 10: 1285740629
ISBN 13: 978-1-28574-062-1

Chapter 1 - Functions and Limits - 1.1 Four Ways to Represent a Function - 1.1 Exercises - Page 22: 64


The graph of the function C(x) as a funtion of x:

Work Step by Step

Basic monthly charge $\$$35 Number of free minutes = 400 Charges for each additional minute of usage = 10 cents The monthly cost in dollars is represented by C The total number of calls is x The cost function is $C(x)= 35 \ for \ x \leq 400$ $C(x)=35+ \frac{1}{10} (x-400) \ for \ x \gt 400$
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