Question: Suppose that the cost function for a commodity is C(x) = 300 + 6x + 1/20 x2 dollars (a) Find the marginal cost at x8

Suppose that the cost function for a commodity is
C(x) = 300 + 6x + 1/20 x2 dollars
(a) Find the marginal cost at x8 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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