Can you help my with this plzzz

Two lines parallel to a third line are parallel to each other. always sometimes or never

Write a function for a rotation 90 degrees counter clockwise about the origin, point 0

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?