Using the equation of exchange, what is nominal GDP if the money supply is $5 trillion and the velocity of money is 4?

A tax levied on each unit of pollution is

A. an income tax. B. a emissions fee. C. a flat tax. D. an international tax.

People cope with uncertainty about the future:

A. in very similar ways, regardless of the situation. B. in many ways, such as buying insurance. C. exactly the same way, regardless of the situation. D. by always avoiding it.