math
posted by jack .
A piano manufacturer has a daily fixed cost of $1200 and a marginal cost of $1500 per piano. Find the cost C(x) of manufacturing x pianos in onde day. Use your function to answer the following questions:
a)On a given day, what is the cost of manufacturing 3 pianos?
b)What is the cost of manufacturing the 3rd piano that day?
c)What is the cost of manufacturing the 11th piano that day?
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