Can anyone explain how to work these? I'm completely lost. Thanks!

1. An object is launched from a platform that is 256 feet above the ground. The height, s, of the

object above the ground t seconds after it is launched is given by the formula s = -16t^2 + 96t + 256

a) What is the height of the object after 2 seconds?

b) How long will it take for the object to hit the ground?

c) When will the object be at a height of 256 feet?

2. A homeowner has installed an in-ground pool in the backyard. The pool is rectangular in

shape, with a length that is 4 feet more than its width. The homeowner put a one-foot-wide concrete

border around the pool. If the area covered by the pool and the border is 96 square feet, find the

dimensions of the pool.