During a 7-year period, the amounts (in millions of dollars) spent each year on buying New vehicles (N) and Used vehicles (U) by United States residents are modeled by the equations below: N = 0.8t2 + 0.4t + 12
U = -0.43t2 + 1.8t + 29
Write a polynomial in standard form that represents the total amount spent each year on buying new and used vehicles in the 7-year period.