Algebra
THe function h(t)=16t^2+v0t+h0 describes the height in feet above the ground h(t) of an object thrown vertically from a height of h0 feet, with an initial velocity of v0 feet per second, if there is no air friction and t is the time in seconds sine the object was thrown. A ball is thrown upward from a 100foot tower at a velocity of 60 feet per second. How many seconds will it take for the ball to reach the ground?
asked by
Joe

0 = 100 + 60 t  16 t^2
16 t^2  60 t  100 = 0
4 t^2  15 t 25 = 0
(4 t + 5)(t  5) = 0
t = 5posted by Damon

t=5
posted by anna
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