A theory is a(n) __________ representation of how two or more variables interact with each other.

Labor productivity is equal to the quantity of

A) real GDP. B) real GDP consumed by the total population in one hour. C) real GDP produced by one hour of labor. D) workers employed during one hour. E) workers who are gainfully employed.

An unregulated, single-price monopoly is shown in the figure above. If its fixed cost is $20, the monopoly's total economic profit when it is maximizing its profit will be

A) negative. B) $0. C) $25. D) $50.