The heighty

y(in feet) of a ball thrown by a child isy=1

16

x

2

+4x+3

y=116x2+4x+3

wherex

xis the horizontal distance in feet from the point at which the ball is thrown.

(a) How high is the ball when it leaves the child's hand? (Hint: Findy

ywhenx=0

x=0.)feet

(b) What is the maximum height of the ball?feet

(c) How far from the child does the ball strike the ground?feet