Which of the following is a polynomial? a)x^4+x^-4+16 b)x^6-2/x-4+3 c)x^2-1 d) 1/x+2

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.