Solve.An electronics manufacturer's revenue R for selling x mobile phones is given by 
A competing electronics manufacturer's revenue for selling a similar mobile phone is 
Under what circumstances will both manufacturers make the same revenue?
A. They will make the same revenue if they sell 390 phones.
B. They will make the same revenue if they sell 0 or 195 phones.
C. They will make the same revenue if they sell 0 or 390 phones.
D. They will never make the same revenue.
Answer: C
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A. 
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