How do I evaluate this? there’s a picture.

After t seconds, a ball tossed in the air from the ground level reaches a height of h feet given by the equation h = 144t-16t^2. after how many seconds will the ball hit the ground before rebounding?

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?

Cone a has a surface area of 384 ft2 and cone b has a surface area of 96 ft? . what is the ratio of their volume?