Help with this pls and thank u

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 the length of the midsegment of a trapezoid with bases of length 15 and 25 ?

Which diagram best shows how fraction bars can be used to evaluate 1/2 divided by 1/4?