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Question

The total cost C(x) associated with the production of x units of an item is given by C(x)=0.05x30.02x2+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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Solution

Since it is Given that marginal Cost is the Instantaneous rate of change of total cost means dCdx

dCdx=3×0.05×x22×0.02×x+30=0.15x2+0.04x+30

Given in the Question, Marginal Costs of 3 units is to be calculated
so, x=3

MarginalCost=1.350.12+30=31.23

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