What is this math please help ASAP

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

How do you find principle and simple interest

Adozen bananas weigh 3 pounds how many ounces does 1 banana weigh