Which of the following is true? i) A rational choice is made on the margin. ii) Microeconomics is the study of the national economy while macroeconomics is the study of the global economy. iii) Economists try to understand how the economic world works by testing normative statements.

The supply of loanable funds comes from:

A. savings. B. investment. C. borrowers. D. taxes.

A ____ is a graph whose axes show the quantities of two inputs that are used to produce some output

a. production indifference map b. two-variable diagram c. scalar diagram d. time-series graph

In terms of wages for full-time employment, men make ________ more than what women make.

A. 1% B. 23% C. 5% D. 15%

The 80/20 ratio is found by dividing the

A. number of households making less than 80 percent of the poverty line by the number of households making more than 20 times the poverty line. B. average income of those below the 80th percentile by the average income of those in the top 20 percent. C. average income of the top 80 percent of income earners by the average income of the top 20 percent of income earners. D. income at the 80th percentile by the income at the 20th percentile.