A boy decides to jump from a high diving board into the middle of a lake. The following expression states his trajectory: f(t)--t2+4+ + 24, where f(t) represents the height in feet and t is seconds.
A. How high was the boy before he dove into the lake?
B. How long did it take the boy to reach his maximum height before falling into the lake?
C. What was the boy's maximum height?