If the additional revenue from hiring an additional worker equals the additional costs from hiring the extra worker, then we know that

In economics, "demand" refers to

A) the intensity of desire for a good. B) the amount of a good people need rather than the amount they want. C) the satisfaction a good will provide a person. D) how much of a good people will buy at any price during a given time period.

A radio station is best described as

A) an end user in a transaction-based market. B) a platform in an audience-making market. C) an end user in a matchmaking market. D) a platform in a shared-input market.