calculus
posted by chelsea .
It is estimated that an annual advertising revenue received by a certain newspaper will be R(x)=0.5x^2+3x+160 thousand dollars when its circulation is x thousand. The circulation of the paper is currently 10,000 and is increasing at a rate of 2,000 per year. At what rate will the annual advertising revenue be increasing with respect to time 2 years from now?

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