Create a profit function p(x) or profit(x) and write it down. obtain this by subtracting the cost function c(x) from the revenue function r(x).

Volume is length times width times height so
20 times 8 times 30 which is 4,800
surface area is ph (p is perimeter of base), h is height.
so perimeter would be length+length+width+width so 20+20+8+8 which is 56. so multiply 56 times 30 which is 1680. hope this !

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