Which of the following is not necessary in order for the corrective tax and pollution permit to have equivalent effects? a. pb must be equivalent to the corrective tax. b. qa must be equivalent to the amount of pollution allowed to the pollution permit holders. c. the equilibrium price and quantity of pollution must be the same in both graphs. d. the amount of pollution emitted by each firm must be the same.

Although appealing to more refined tastes, art as a collectible has not always performed so profitably. during 2003, an auction house sold a sculpture at auction for a price of $10,211,500. unfortunately for the previous owner, he had purchased it in 2000 at a price of $12,177,500. what was his annual rate of return on this sculpture? (a negative answer should be indicated by a minus sign. do not round intermediate calculations and enter your answer as