Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 7 - Functions and Graphs - Review Exercises: Chapter 7 - Page 496: 22


Domain = $\{t\in \mathbb{R}\ \ |\ 0\leq t\leq 60\}$

Work Step by Step

If a function is used as a model for an application, the problem situation may require restrictions on the domain. For example, length and time are generally nonnegative, and a person's age does not increase indefinitely. $t$ is a nonnegative value, and so is $r(t),$ so we restrict t with $ 900-15t\geq 0\qquad$... add 15t $ 900\geq 15t\qquad$... divide with 15 $60\geq t$ Domain = $\{t\in \mathbb{R}\ \ |\ 0\leq t\leq 60\}$
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