Question 227436
h(t)=-2t^2+30t+500
Max height will be at the vertex of the parabola.
t = -b/2a = -30/-4 = 7.5 seconds
---------------------------------
h(7.5) = -2*56.25 + 30*7.5 + 500
max h = 612.5 feet
-------------
It seems odd to jump off a building and ascend 112 feet.  Maybe he was trying to jump over it.