SOLUTION: Suppose that a factory's cost (in dollars) for making x cars is
C(x)=5410x+5510
Then the average cost per car is
C'(x)=5410x+5510/x
How many cars must the factory make each day
Question 1142293: Suppose that a factory's cost (in dollars) for making x cars is
C(x)=5410x+5510
Then the average cost per car is
C'(x)=5410x+5510/x
How many cars must the factory make each day to ensure the average cost per car is no more than $5600? Found 3 solutions by rothauserc, ikleyn, josgarithmetic:Answer by rothauserc(4718) (Show Source): You can put this solution on YOUR website! (5410x +5510) / x = 5600
:
5410x +5510 = 5600x
:
190x = 5510
:
x = 29
:
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The factory must make at most 29 cars daily
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:
The solution and the answer by tutor @rothauserc is INCORRECT.
The correct answer is THIS : the factory must produce at least 29 cars daily.
It is absolutely clear for anybody when he (or she) will turn on his (or her) common sense.