Please help i really really need to pass!

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

Look at attachment. has all info needed. need

Somone me i want to know what 18 hours out of 24 hours in a fraction