Activity 6: Application. Answer each question based on the problem. From a 100 feet building, a ball is thrown straight up into the air then follows a trajectory. The height h(t) of the ball above the building after t seconds is given by the function h(t) = –20(t - 3)2 + 180. = t 1. What is the vertex of the graph shown by the function? 2. How far does the ball reach at its maximum point? 3. How long does the ball reach the highest point? 4. After how many seconds does the ball reach the ground? 5. What is the value of a in the equation?​