Precalculus (6th Edition) Blitzer

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

Chapter P - Section P.9 - Linear Inequalities and Absolute Value Inequalities - Exercise Set - Page 139: 111

Answer

The number of outcomes would be either less than 42 or more than 58.

Work Step by Step

Solving $|\displaystyle \frac{h-50}{5}|\geq 1.645\qquad $ Multiply with 5 $|h-50|\geq 8.225$ $|u| \gt c $ is equivalent to ($ u\lt -c $) or ($ u\gt c $) $ \begin{array}{lllll} h-50\leq-8.225 & /+50 & ...or... & h-50\geq 8.225 & /+50\\ h\leq 41.775 & & & h\geq 58.225 & \\ h\in(-\infty,41.775] & & or & h\in[58.225,\infty) & \\ & & & & \end{array} $ The number of outcomes is a whole number, so $ h $ is either less than 42 or more than 58.
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