Physics is killing me?

Question

A ball is thrown horizontally at 22.2 m/s from the roof of a building and lands 36.0 m from the base of the building. How high is the building?

Answer 1

OH GOD IM NOT READY FOR PHYSICS... AND I HAVE IT THIS YEAR!!

GOOD LUCK!

Answer 2

(36m)/(22.2m/s) = 1.622s

As the acceleration due to gravity is -9.8m/s^2 the equation for displacement is

D(x) = -4.9x^2 + 0x (the initial velocity down) + C (the height of the building)

D(1.622) = 0 = -4.9(1.622)^2 + C

C = 12.88 m

Therefore the building is 12.88 meters high.