The initial height of the diving board is 5 m. The time at which Jeremiah reaches his maximum height is the x-
coordinate of the vertex.
T =
-b
2a
2
20
--9.8
= 0.82 sec
It took Jeremiah
seconds to reach his maximum
height.
The maximum height was reached by Jeremiah at
seconds. The maximum height is the y-coordinate of the vertex.