Please help asap ill give 5 stars if right and I really need help

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

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

How to use order of operation in 20 divide by 4 multiply 5 = 1