Answer
3.5 seconds
Work Step by Step
$d=at^2/2$
$d=2(ft/s)*t^2/2$
$12 ft = 2ft/s * t^2/2$
$12 ft/2ft = 2ft/s*1/2*t^2/2ft$
$6 = t^2/2 s$
$6*2 = t^2/2*2 s$
$12 = t^2 s$
$\sqrt {12} =\sqrt {t^2}$
$ 3.464 = t$
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 9 - Quadratic Functions and Equations - 9-3 Solving Quadratic Equations - Practice and Problem-Solving Exercises - Page 552: 50
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