A rectangular box is to have a square base and a volume of 20 ft3. The material for the base costs 15 cents/ftz, the material for the top costs 6 cents/ftz, and the material for the sides costs 16 cents/ftz. Ifx denotes the length of one side of the base (in feet), find a function in the variable x giving the total cost of materials used in constructing the box in cents. Total Cost, as a function ofX = Determine the domain of the total cost function. Enter your answer using interval notation. Domain of total cost function =