If the long-run total cost curve for each firm is given by TC = 60Q - 70Q2 + 4Q3, in the long run, the marginal cost is:
A) 60 - 70Q + 4Q2.
B) 60 - 140Q + 12Q2.
C) 60Q - 70Q2 + 4Q3.
D) -70Q2 + 4Q3.
Correct Answer:
Verified
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