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The total cost C(x) in Rupees, associate...

The total cost C(x) in Rupees, associated with the production of x units of an item is given by `C(x) = 0.005 x^3 - 0.02 x^2 + 30x + 5000` Find the marginal cost when 3 units are produced, where by marginal cost we mean the instantaneous rate of change of total cost at any level of output.

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