The Demand Function for a Commodity Is Given By $$p = 2,000 - 0.1 x - 0.01 x ^ { 2 } .$$

Short Answer

The demand function for a commodity is given by
$$p = 2,000 - 0.1 x - 0.01 x ^ { 2 } .$$
Find the consumer surplus when the sales level is 75 .