Donaldson's Milliners produces hats. It costs C(x), in thousands of dollars, to produce x thousand hats, where C (x) = 40 -0.08x 18 e - Find the marginal cost where 10,000 hats are produced, and estimate the cost of producing 11,000 hats. (Hint: x = 10 represents 10,000 hats; also C'(x) = C(x+1) - C(x) )

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