The cost of producing x ounces of gold from a new gold mine is C − f (x) dollars. (a)  What is the meaning of the derivative f'(x)? What are its units? (b)  What does the statement f'(800) = 17 mean? (c)  Do you think the values of f'(x) will increase or decrease in the short term? What about the long term? Explain.

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A:

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