If the equilibrium price of a good decreases and the equilibrium quantity of the good decreases, we can conclude that

More firms produce MP3 players or electronics workers' wages rise? (Draw the diagrams!)

What will be an ideal response?

In 1820, when the nation began its westward movement in earnest, the median American was

(a) less than 17 years old. (b) about 20 years old. (c) about the same age as the median American today. (d) older than the median American today.