If a ping pong ball falls from the top of a building that is 168 feet high, how many seconds will it take the ball to hit the ground? Remember, the formula for distance is d=16t^2
well, since
16t^2 = 168
t^2 = 168/16
t = √168 / 4 = appr 3.24 sec
they gave you the formula, what was the problem?