Question 1056879
h(x) = -0.0498x^2 + 0.7538x
Set it equal to 0.
factor out a -x(0.0498x-0.7538x=0
0.0498x=0.7538
x=15.13 feet
You can use x=(1/2a)(-b+/- sqrt (b^2-4ac)), but in this instance the factoring is easier.
{{{graph(300,300,-1,17,-10,10, -0.0498x^2+0.7538x)}}}
-b/2a gives the x value of the vertex, useful when you want to know the maximum height of the ball.