Question: 12. a rectangular box w/ no top is to have a square base + a volome of 20 #3. The material for the base costs

12. a rectangular box w/ no top is to have a square base + a volome of 20 #3. The material for the base costs 30 cents/ f12 + the material for the sides cost 12 cents/ fiz. If x denotes the length of one side of the base ( In feet), find the function In the variable * giving the total cost of materials used in constructing the box in cents

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