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7. Suppose the cost, in dollars, of producing x items is given by the function C(x)...

7. Suppose the cost, in dollars, of producing x items is given by the function C(x) = 1/6x3+ 2x2+ 30. Current production is at x = 9 units.

(a) (3 points) Use marginal analysis to find the marginal cost of producing the 10th unit.

(b) (3 points) Find the actual cost of producing the 10th unit.

Math   Calculus   
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