Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 1 - Section 1.3 - More on Functions and Their Graphs - Exercise Set - Page 199: 114

Answer

The cost of mailing a letter that weighs 1.8 ounces is $0.71$ dollars.

Work Step by Step

The cost of mailing a letter of weight 1.8 ounces is the value of the function at a weight of 1.8 ounces. The cost of mailing a letter that weighs 1.8 ounces can be calculated as below: It can be observed from the graph that the value of the function remains constant from $x=2$ to $x=3$. So the value of the function at $x=1.8$ is as below: $f\left( 1.8 \right)=0.71$ Hence, the cost of mailing a letter that weighs 1.8 ounces is $0.71$ dollars.
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