, a ball is thrown vertically upward from the top of the tower at 4.9 metres per second it strikes the pond near the base of the towers after 3 seconds the height of the tower is. Pls reply...

Answer 1

h(t) = x + 4.9t - 4.9t^2
if h=0 when t=3, then

x + 4.9(3) - 4.9(9) = 0
x = 29.4