The demand for a commodity generally decreases as the price is raised. Suppose that the demand for oil (per capita per year) is D(p) = 1050/p barrels, where p is the price per barrel in dollars. Find the demand when p= 40. Estimate the decrease in demand if p rises to 41 and the increase in demand if p is decreased to 39. The demand D(40) = The decrease in demand The increase in demand => barrels. barrels.

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