Solve.Acme Communication finds that the total revenue function associated with producing a new type of cellular phone is 
and the total cost function is 
where x represents the number of units of cellular phones produced. Find the total profit function, P(x) .
A. P(x) = x4 - 199x2 + 8000
B. P(x) = -x2 + 199x - 8000
C. P(x) = -2x2 + 221x - 9000
D. P(x) = -x2 + 215x + 8000
Answer: B
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?
?
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