A rectangular box is to have a square base and a volume of 30 At3. The material for the base costs 25 cents/ft2, the material for the top costs 17 cents/ft2, and the material for the sides costs 10 cents/ft2. If x 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 of x = Determine the domain of the total cost function. Enter your answer using interval notation. Domain of total cost function =