If potential output equals 3,000 and short-run equilibrium output equals 3,500, there is a(n) gap and the federal reserve must real interest rates in order to close the gap.
a. recessionary; raise b. recessionary; lower c. recessionary; not change d. expansionary; raise

D. expansionary; raise

Explanation:

In order to maintain the equilibrium, in this case,

The Federal Reserve will opt for expansionary monetary policies, under which the real interest rates will be increased by the Federal Reserve.

As the output is less than the equilibrium output, by increasing the real interest rates, the equilibrium can be achieved.

answer: a. the kind of population living in your neighbourhood.

the census explorer data tool by the us census bureau allows the user to zoom in on any neighbourhood within the united states and find the kind of people residing in that by race and age.  

the tool needs to needs to be used twice – once in order to find what type of people reside in a neighbourhood, and then to see the age groups of the people in the same neighbourhood.