Andre, a wheat farmer, is deciding whether or not to add fertilizer to his crops. If he adds 1 pound of fertilizer per acre, the value of the resulting crops rises from $80 to $100 per acre. According to marginal analysis, Andre should add fertilizer if it costs less than

A production possibilities frontier will be bowed out if

a. there is scarcity b. resources are used efficiently c. production of one good involves an opportunity cost d. resources are not perfectly adaptable to making each good e. technology is improving

Social disapproval carries a higher cost in all of the following cases except when you:

A. know the people around you. B. care about the opinions of people around you. C. expect to interact with the people around you again in the future. D. have very loose interactions with community members.