<PRE><B>Question 304649</B>
S(t)= 16t^2  32t + 128.
a) What is the height of the wrench after 1 second?
S(1) = -16 - 32 + 128
= 80 feet
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b) How long does it take for the wrench to reach the
ground?
16t^2  32t + 128 = 0
t^2 + 2t - 8 = 0
(t+4)*(t-2) = 0
t = 2 seconds
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