The key variable in determining changes in a country's standard of living is the

The corporate income tax is

a. a tax on corporate profit, not revenue. b. the single largest source of federal revenue. c. a payroll tax paid partially by employees and partially by employers. d. has increased as a proportion of federal tax revenue since 1950.

If Real GDP is $6 billion and the population is 300,000, per-capita Real GDP is

A) $30,000. B) $20,000. C) $33,333. D) $39,434.