Posted by **moises** on Monday, April 8, 2013 at 1:21am.

if a ball is thrown vertically upward with an initial velocity of 48 ft/s, then its height, s, after t seconds is given by s(t)= 48t-16t^2.

a) what is the velocity of the ball after 1 second?

b) when does the ball hit the ground?

c) with what velocity does the ball hit the ground?

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