Question: only need help with parts c and d please 25. The monthly profit (in dollars) of a certain artist is given by P(x) =-15x +150x

only need help with parts c and d please 25. The

only need help with parts c and d please

25. The monthly profit (in dollars) of a certain artist is given by P(x) =-15x +150x +300x-400, where x is the number of pieces sold. (a) Graph P(x) and P'(x). (b) What is the marginal profit when 6 pieces are sold? (c) What is the profit when the marginal profit is greatest? (d) What is the maximum profit possible? (Assume x is an integer.)

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