Question 420495
The equation is a parabola with 2 places where {{{h = 3}}} ft. 
The 1st place is (0,3), when the batter hits the ball.
The ball has to eventually come back to that same height
{{{ h = -.005x^2 + x + 3 }}}
{{{ 3 = -.005x^2 + x + 3 }}}
Subtract {{{3}}} from both sides
{{{ -.005x^2 + x = 0 }}}
{{{ x*(-.005x + 1) = 0 }}}
So, {{{h = 3}}} when {{{x = 0}}} and
{{{h = 3}}} when {{{-.005x + 1 = 0 }}}
Add {{{.005x}}} to both sides
{{{ .005x = 1 }}}
{{{x = 1/.005}}}
{{{x = 200}}}
The ball has traveled 200' horizontally 
Here's a plot:
{{{ graph( 500, 500, -20, 230, -10, 70, -.005x^2 + x + 3) }}}