According to central place theory, the threshold is defined as the economic base of a central place Answer A: economic base of a central place A distance away from a central place Answer B: distance away from a central place B gross value of the product minus the costs of production Answer C: gross value of the product minus the costs of production C minimum number of people needed to support a service Answer D: minimum number of people needed to support a service D point at which consumer movement is at a minimum

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.

True because folding a piece of paper is like reflecting one side of the fold through the fold.