What do you need to do to solve x/6=18

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?

Using inductive reasoning, what are the next two number in this set? 2,3/2,4/3,5/4,

The equation of a parabola is given. y=18x2+4x+20 what are the coordinates of the focus of the parabola?