Precalculus (6th Edition)

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

Chapter 2 - Graphs and Functions - 2.3 Functions - 2.3 Exercises - Page 218: 94

Answer

(a) $240\ ft$ (b) $1$ and $5\ sec$ (c) Going up from 0 to 3 seconds, going down from 3 to 7 seconds. (d) $256\ ft$, $3\ sec$ (e) $7\ sec$

Work Step by Step

(a) Locate $t=2\ sec$, go upwards to meet the curve, read its vertical value as $h(2)=240\ ft$ (b) Locate $h=192\ ft$, go horizontally to meet the curve, read its t-values as $t=1, 5\ sec$ (c) Going up from 0 to 3 seconds, going down from 3 to 7 seconds. (d) Locate the maximum at $h=256\ ft$ read the time as $t=3\ sec$ (e) The ball hits the ground when $h=0$, the total time is $t=7\ sec$
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