64% of x is 140 please help me right away and solve me x!

Fredrick designed an experiment in which he spun a spinner 20 times and recorded the results of each spin

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

Math it's appreciated. (picture provided)