A circular-flow diagram is a visual model of the economy

Suppose that the nominal exchange rate between the U.S. dollar and the Mexican peso is 0.10 dollars per peso. If Mexico's inflation is 10 percent and the United States' inflation is 0 percent, from the U.S. point of view, the real exchange rate

A) appreciates to 0.11 dollars per peso. B) depreciates to 0.11 dollars per peso. C) appreciates to 0.09 dollars per peso. D) depreciates to 0.09 dollars per peso.

Which statement is true?

A. A pure private good can never be jointly consumed. B. The price theory we studied always considers efficient output to be the place where marginal cost equals marginal benefit, even if the good is a pure public good. C. For efficiency to be achieved in the production of a public good everyone should be taxed an amount equal to the value they place on the last unit of the good provided times the quantity of public good provided. D. All of these are true.