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Werner Installs Custom Sound Systems in Cars

Question 147

Multiple Choice

Werner installs custom sound systems in cars.If he installs seven systems per day,his total costs are $300.If he installs eight systems per day,his total costs are $400.Werner will install eight sound systems per day only if the eighth customer is willing to pay at least:


A) $300.
B) $400.
C) $100.
D) $50.

Correct Answer:

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