Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 1 - Section 1.5 - Equations - 1.5 Exercises - Page 57: 127

Answer

$t=4.2sec$

Work Step by Step

Plug in $0$ for $h$, then plug in $288$ for $h_{0}$ (the height after zero seconds). Subtract $288$ to the other side. Divide by $-16$. Square root of positive $18$.
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