For the cost function below, where C is the cost of producing x units of a product, find the marginal-cost function. What is the marginal cost at the given value C(x) = 0.04x +0.7x + 40x + 130; x= 1000 The marginal-cost function is C'(x)=| %3D The marginal cost when x= 1000 is $ (Round to two decimal places as needed.)

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