Suppose that an object is dropped from the top of the leaning tower of pisa, 185 feet above the ground. The objects height in feet, h, after t seconds is given by the following ntion: h(t)= -16t^2+185. How long will it take for the object to hit the ground?

Answer 1

when it hist the ground the height is zero, right?
so just solve

-16t^2+185 = 0