In functions do you turn the fractions into decimals?

Given a(-12,5) and b(12,29) find the point that divides the line segment ab three-eighths of the way from a to b

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 quotient with the restriction.