It costs a petroleum refinery $0. 39 to refine one gallon of gasoline, and $0. 39 to refine one gallon of natural gas. The refinery can sell gasoline for $2. 11 per gallon, and can sell natural gas for $1. 60 per gallon. Due to the refining process, the refinery must produce and sell twice as much natural gas as it does gasoline. If the refinery’s monthly overhead costs, not including production costs, are $180,000, how many gallons of natural gas will the refinery have sold when it breaks even each month? Round to the nearest whole gallon, if necessary. A. 86,957 b. 141,732 c. 148,760 d. 217,392.

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The business cycle is the periodic but irregular up-and-down movement in economic activity, measured by fluctuations in real gross domestic product (gdp) and other macroeconomic variables. a business cycle is typically characterized by four phases—recession, recovery, growth, and decline—that repeat themselves over time. economists note, however, that complete business cycles vary in length. the duration of business cycles can be anywhere from about two to twelve years, with most cycles averaging six years in length. some business analysts use the business cycle model and terminology to study and explain fluctuations in business inventory and other individual elements of corporate operations. but the term "business cycle" is still primarily associated with larger (industry-wide, regional, national, or even international) business trends.