Most competitors in the music download industry see Apple's iTunes Music Store as a ________ because it created a closed system with mass appeal

Fractions are mathematical expressions for the _____________ of two quantities

a. sum b. total c. difference d. quotient

One of the characteristics of forecasts is

A) aggregate forecasts are usually more accurate than disaggregate forecasts. B) disaggregate forecasts are usually more accurate than aggregate forecasts. C) short-term forecasts are usually less accurate than long-term forecasts. D) long-term forecasts are usually more accurate than short-term forecasts.