Please help anyone ?

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

Find the values of y: 3y^3(y^2+ 2/3y)=0

At 6 1/2 cents per pound of string beans how much does 7 pounds cost