Business In Example 11 of Section 1.2, we saw that the cost C of producing x thousand DVDs...

Business In Example 11 of Section 1.2, we saw that the cost C of producing x thousand DVDs is given by

(a) Write a rational expression in lowest terms that gives the average cost per DVD when x thousand are produced. (Hint: The average cost is the total cost C divided by the number of DVDs produced.)

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(b) Find the average cost per DVD for each of these production levels: 20,000, 50,000, and 150,000.