Question 1118687
.
<pre>
Both the starting point and the ending point are located at the roots of the quadratic equation


h = 0 = -{{{(x-19)^2 + 17}}} = 0,     or


{{{(x-19)^2}}} = 17,


{{{x[1,2]}}} = +/-{{{sqrt(17) + 19}}}.


The difference (= the distance) between the roots  {{{x[2]}}} = {{{sqrt(17)+19}}}  and  {{{x[1]}}} = {{{-sqrt(17)+19}}}  is  {{{2*sqrt(17)}}} = 8.248 meters  (approximately).


<U>Answer</U>.  8.248 meters  (approximately).
</pre>