What age group in the United States has the largest percentage of its members living in poverty?

Most economists believe that changes in the price level have

A) no effect on the quantity of output supplied in either the short run or the long run. B) an effect on the quantity of output supplied in the short run, but not in the long run. C) an effect on the quantity of output supplied in the long run, but not in the short run. D) an effect on the quantity of output supplied in both the short run and the long run.

The steam engine was first invented by

a. Heron of Alexandria b. James Wyatt c. Robert Fulton d. Denis Papin