Answer
$14.14$ second (approx.)
Work Step by Step
We have $s(t)=16t^2$
Plug $s(t)=3200 ft$
Thus,
$3200=16t^2$
This implies that $t^2=200$
Thus, $t=\sqrt {200}$
Hence, $t=14.14$ second (approx.)
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 8 - Section 8.1 - The Square Root Property and Completing the Square - Exercise Set - Page 594: 82
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