All workers must join the union within 30 days after employment in a

For a monopoly, marginal revenue is equal to

A) the amount people buy at a given price. B) the amount people buy between two prices. C) the change in total revenue brought about by a one-unit increase in quantity sold. D) the price multiplied by the quantity sold. E) the price of the product.

If a decrease in income leads to an increase in the demand for macaroni, then macaroni is

A) an inferior good. B) a necessity. C) a neutral good. D) a normal good.