A particular computing company finds that its weekly profit, in dollars, from the production and sale of x laptop computers is P(x) = - 0.004x -0 4x2 + 500x – 700. Currently the company builds and sells 9 laptops weekly a) What is the current weekly profit? b) How much profit would be lost if production and sales dropped to 8 laptops weekly? c) What is the marginal profit when x = 9? d) Use the answer from part (a) and (c) to estimate the profit resulting from the production and sale of 10 laptops weekly a) The current weekly profit is $ (Round to the nearest cent as needed.)

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