posted by shannon .
The demand function for a certain brand of CD is given by the following equation where p is the wholesale unit price in dollars and x is the quantity demanded each week, measured in units of a thousand.
Determine the consumers' surplus if the wholesale market price is set at $4/disc. (Round your answer to two decimal places.)
-.01x^2 - 0.1x + 6 = 4
x=10 or -20
not sure what the "consumers' surplus" is defined as, unless it's when x<0, since demand is negative