What kind of number is divisible by only itself and 1?

What are the sotions to the quadratic equation 9x^2=4

What could explain what happened when the time was equal to 120 minutes

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.