The high diver jumps off the springboard. For h (in meters) and t (in seconds) after diver leaves board, her height above water is provided by
h=f(t)=-4t2+8t+10
A. How high above water is springboard?
B. When does diver enter water?
C. When does diver reaches her maximum height?
D. Find maximum height (above the water) diver gets?
E. Find domain of this function.