PLEASE Help I DONT Know The Answer

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.

Which of the following is the shape of a cross section of the figure shown below

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?