How do i solve thiss

The height of a flare fired from the deck of a ship in distress can be modeled by h(t)= -2(8t^2-52t-28), where h is the height of the flare above water and t is the time in seconds. a. find the time it takes the flare to hit the water.

How to find the exponential function y=ca^x, with points (1,2) and (2,1)

Which of the following constants can be added to x2 - 3x to form a perfect square trinomial?