________ countries tend to depend on tariffs for a relatively large part of their government revenue

Suppose per capita real GDP grows by 7% per year. Based on the Rule of 70, approximately how many years will it take for the level of per capita real GDP to double?

A) 7 years B) 10 years C) 4.9 years D) none of the above

What is measured on the horizontal axis on the aggregate demand graph?

A) nominal income B) real GDP per year C) unemployment D) the price level