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:

Verified
Correct Answer:
Verified
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