Coin is dropped from the top of the building.T he distance d(in feet) between the coin and the ground t seconds after its dropped is given by d= - 16t^2 + 144.

Question

How long after the coin is dropped does it hit the ground?

 

Include steps please<3

Answer 1

Set d(t) = 0 and solve for t.

 

-16t² + 144 = 0

 

16t² = 144

 

t = 3 seconds