Suppose an object is dropped from a height h0 above the ground. Then its height after t seconds is given by h = −16t2 + h0, where h is measured in feet. Use this information to solve the problem. A ball is dropped from the top of a building 60 ft tall. (Round your answers to three decimal places.) (a) How long will it take to fall half the distance to ground level? s (b) How long will it take to fall to ground level?