Which of the following situations can be modeled by a function whose value changes at a constant rate per unit of time? Select all that apply.

Which of the fallowing best completes the sequence 12,8,5, a) 1 b) 2 c)4 d)0

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.

Asap! i'm not good math and i'm lost.