The height y (in feet) of a ball thrown by a child is given by the equation y = - 1/
9
x^2 + 5x +3, where x is the horizontal distance (in feet) from the starting point. what is the maximum height of the ball?
a) -165.75 ft
b) -84.75 ft
c) 50.25 ft
d) 59.25 ft