Which of the following sectors in the economy accounted for about 70% of the spending in the U.S. during 2009?

Which one of the following statements is true?

a. A static reserve index will indicate a longer resource lifetime than an exponential reserve index b. A reserve base index indicates a longer resource lifetime than a reserve index c. Most non-renewable resource prices have increased over the past 40 years d. Eventually all physical reserves of non-renewable resources will be depleted e. The price path for a non-renewable resource typically looks like an inverted U shape

In the Keynesian model, the real wage is mildly procyclical because

A) demand for labor fluctuates with the demand for final goods. B) firms take advantage of recessions to pay slightly lower wages, since there's excess labor supply. C) workers' effort may depend on the unemployment rate and the real wage. D) the supply of labor fluctuates with the business cycle.