Question 281393
In order to solve this problem, you need to know a kinematic equation that maps the jump of this stunt double. The general equation is:

{{{X(t) = 1/2*a*t^2 + v * t + h}}}

Where a is acceleration, t is number of seconds, v is initial velocity and h is initial height.

When you plug in the information you are given, you will have the equation:

{{{X(t) = 1/2 * a * t^2 + 10 * t + 50}}}

I am going to assume this jump takes places on earth and therefore experience gravity with no air resistance, therefore a = -9.8 (works downward), however, we need it in feet as the rest of your units are in feet.

9.8 meters is approximately 32.2 feet 

Therefore your new equation is

{{{X(t) = 1/2 * -32.2 * t^2 + 10 * t + 50}}}

if we go ahead and multiply 1/2 with -32.2 we get:

{{{X(t) = -16.1 * t^2 + 10 * t + 50}}}

This is the equation you need to graph, there are several ways to graph this equation, one being finding the roots and getting a general idea what the graph looks like. The second being completing the square and finding out the vertex and graphing it like that. When you find the roots, you will get two answers, you will see which answer fits the problem the best.

Hopes this helps