Question

A ball is thrown vertically upward from the roof of a building 60 ft high, so that its distance from the roof at any time t, in seconds, is given by the equation s=-16t^2+52t. Determine after how many seconds the ball will hit the roof.

Answer 1

set equal to 0...solve for t

-16t^2 +52t = 0
factor out a t
t(-16t+52) = 0
16t = 52
t = 52/16 = 13/4

Answer 2

Thank you so much

Answer 3

yw