Suppose that Dent Carr's long run total cost of repairing s cars per week is c（s）=3s2 + 27.If th
Suppose that Dent Carr's long run total cost of repairing s cars per week is c（s）=3s2 + 27.If the price he receives for repairing a car is 30， then in the long run， how many cars will he fix perweek if he maximizes profits？
A.5
B.0
C.10
D.7.5
正确答案：5
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