Question: Suppose that the cost function for a commodity is C(x) = 300 + 6x + 0.05x 2 dollars (a) Find the marginal cost at x

Suppose that the cost function for a commodity is 

C(x) = 300 + 6x + 0.05x2 dollars

(a) Find the marginal cost at x = 8 units and tell what this predicts about the cost of producing 1 additional unit.

(b) Calculate C(9) - C(8) to find the actual cost of producing 1 additional unit.

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