I need help please (25 points)

How to use order of operation in 20 divide by 4 multiply 5 = 1

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.

What is coefficient of the term of degree of degree 5 in the polynomial below