Problem 56E

56. The quantity (in pounds) of a gourmet ground coffee that is sold by a coffee company at a price of $p$ dollars per pound is $Q=f(p)$.

(a) What is the meaning of the derivative $f^{\prime}(8) ?$ What are its units?

(b) Is $f^{\prime}(8)$ positive or negative? Explain.

 

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