Multiple Choice
Suppose the average costs of a mining operation depend on the number of machines used, and average costs, in dollars, are given by ,
, where x is the number of machines used. What is the minimum average cost? Round your answer to the nearest dollar.
A) $0
B) $35
C) $490
D) $245
E) $8,582
Correct Answer:

Verified
Correct Answer:
Verified
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