Find the circumference

please help :)

15 points ! ~ see if you know the answer to both you!

Monica build a remote control toy airplane for science project to test the plane she launched it from the top of a building the plane travel a horizontal distance of 50 feet before landing on the ground a quadratic function which models the height of the plane in feet relative to the ground at a horizontal distance of x feet from the building is shown

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r