help me please!

Question

An object is dropped from 49 feet below the tip of the pinnacle atop a 949-ft tall building. The height h of the object after t seconds is given by the equation h equals negative 16 t squared plus 900. Find how many seconds pass before the object reaches the ground.

Answer 1

Set h(t) = 0 and solve the resulting quadratic equation for t.

 

-16t² + 900 = 0

 

t = √(900/16) s = ? s