Help me please, I have multiple questions

Acar travels at an average speed of 52 miles per hour. how long does it take to travel 299 miles

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.

Nikolas calculated the volume of the prism. his work is shown below.