Suppose that a country imports $5.7 billion of goods and services and exports $4.2 billion of goods and services. What is the value of net exports?

Other things equal, which of the following would increase the rate of economic growth, as measured by changes in real GDP?

A. A decline in the average length of the workweek. B. A decrease in the labor force participation rate. C. An increase in the size of the working age population. D. A decline in the amount of capital per worker.

Since 1975, U.S. exports and imports have:

A. grown absolutely but remained a constant proportion of GDP. B. grown absolutely but declined as a proportion of GDP. C. grown both absolutely and as a percentage of GDP. D. declined both absolutely and as a percentage of GDP.