The demand function for a certain make of replacement cartridges for a water purifier is given by
?
?
where p is the unit price in dollars and x is the quantity demanded each week, measured in units of a thousand. Determine the consumers' surplus if the market price is set at $1/cartridge. Round your answer to the nearest dollar.
?
A. $22,006
B. $21,526
C. $21,445
D. $21,667
Answer: D
Mathematics
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