Joe is maximizing utility by consuming three colas at $2 apiece and four hot dogs. The last cola gave him 200 units of utility, and the last hot dog gave him 300 units of utility. The price of each hot dog is:

Trend-wise, the worldwide population is going as follows:

a. More rural b. More urban c. Larger family size d. Rapidly decreasing in places like Sao Paolo, Brazil

The balance of payments is

A) a summary record of the financial transactions of a country's government with foreign governments. B) a summary record of a country's imports and exports of goods with foreign residents and governments. C) a summary record of a country's economic transactions with foreign residents and governments. D) a summary record of a country's purchases and sales of goods and services in the world market.