Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 1 - Equations and Inequalities - 1.6 Other Types of Equations and Applications - 1.6 Exercises - Page 145: 3

Answer

$\frac{1}{4}$.

Work Step by Step

RECALL: If a worker can finish a job in $x$ hours, then the worker completes $\frac{1}{x}$ of the job per hour. Thus, if a job can be completed in 4 hours, then $\frac{1}{4}$ of the job gets completed each hour. Therefore, the missing expression in the given statement is $\frac{1}{4}$.
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