Which tool is not needed to construct a perpendicular bisector

Find the vertex of the function given below y=x^2-6x+1

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

Acompany made a profit of 75000 over a period of 6 years on an initial investment of 15000 what is the annual roi