Solve.John owns a hotdog stand. He has found that his profit is represented by the equation 
with P being the profit in dollars, and x the number of hotdogs sold. How many hotdogs must he sell to earn the most profit?
A. 39 hotdogs
B. 40 hotdogs
C. 20 hotdogs
D. 41 hotdogs
Answer: A
Mathematics
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