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math

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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.

p=-0.01x^2-0.1x+6

Determine the consumers' surplus if the wholesale market price is set at $4/disc. (Round your answer to two decimal places.)

  • math - ,

    -.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

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