What is the percent markup of $7.50

And explain how you got it so i can understand future problems : 3

How do i do this? i don’t understand

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.