posted by Brandi .
A brick becomes dislodged from the top of a state building (at a height of 1290 feet) and falls to the sidewalk below.
(a) Write the position, velocity, and acceleration functions of the brick.
(b) How long does it take the brick to hit the sidewalk?
(c) How fast is the brick traveling when it hits the sidewalk?
s = 1290 - 16t^2
... for v,a
(b) solve for t:
1290 - 16t^2 = 0
(c) plug that t into v(t)