If the weekly total cost of producing 27" Toshiba television sets is given by C(x) = 50,000 + 105x, where x is the number of sets produced per week, then the average cost per unit is given by

(a) What is the average cost per set if 30000 sets are sold?
(b) Graph this function.
(c) Does the average cost per set continue to fall as the number of sets produced increases?

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50,000 + 105x C(x) =