Barrons AP Calculus - David Bock

(dmanu) #1

  1. (C) From Answer 4


s(t) = −16t^2 + 40t + 96.
Then
s ′(t) = −32t + 40,
which is zero if t = 5/4, and that yields maximum height, since s ′′(t) = −32.
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