An unconfined aquifer with a head of 120 ft (from the bottom of the aquifer) was evaluated using a pumping test. After the head reached the steady state, A total of 24,000 cubic foot of water was pumped out in a period of 6 hours. At a distance of 1,000 ft from the pumping well, the drawdown was 40 ft; and at a distance of 5,000 ft it was 20 ft. Find the permeability (in ft/sec, and cm/sec) of the aquifer assuming that steady-state conditions prevail. (pay attention to the relation drawdown and head; use the formula I discussed in class).

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.

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