When quantity supplied is very responsive to a change in price, supply is

Jim' burger produces 500 burgers per week. Each burger is priced at $3 . What is the marginal revenue of selling the 50th burger?

a. $3 b. $150 c. $147 d. It cannot be determined with the information given

Briefly and concisely define the following concepts and terms.

a. marginal social cost b. detrimental externalities c. free-rider problem d. cost disease e. “defective telescopic faculty”