Answer
$40\le x\lt60$ where $x$ is the age.
Work Step by Step
Based on the statement, we have $40\le x\lt60$ where $x$ is the age.
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0-32193-104-1
ISBN 13:
978-0-32193-104-7
Appendix A - Review - A.10 Internal Notation; Solving Inequalities - A.10 Assess Your Understanding - Page A88: 92
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