The marginal revenue curve for a monopoly firm starts at the same point on the vertical axis as the (i) average revenue curve. (ii) marginal cost curve. (iii) demand curve

Which of the following questions is a macroeconomic issue?

A) How many more pounds of cookies will a consumer purchase if the price of cookies decreases? B) What effect would a cure for Mad Cow Disease have on the market for beef? C) What is the future growth prospect for an economy? D) How many workers should the owner of a business hire?

If you travel to Mexico you will often see currency exchange businesses along the way as you approach the border

Even though each of these businesses is essentially "selling" the same product (i.e. Mexican pesos) how is it that some of them are able to charge more for the peso than others?