Someone who studies the pricing policies of the Microsoft Corporation would be a microeconomist

Which of the following factors does not affect the long-run supply and demand conditions of foreign currencies?

A) Relative inflation rates B) Relative productivity levels C) Tastes for domestic versus foreign goods D) All of the above affect the long-run supply and demand conditions of foreign currencies.

If the utility function (U) between food (F) and clothing (C) can be represented as U = , the marginal rate of substitution of clothing for food equals

A) -C/F. B) -F/C. C) - . D) - .