9. The biggest cycle of money in the circular flow model is

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the market value of the final production of goods and services within the geographic borders of a country in a given period; for example, if the GDP of India is \$2.264\text{ trillion}$2.264 trilliondollar sign, 2, point, 264, start text, space, t, r, i, l, l, i, o, n, end text in 2016, this means that this is the value of all new goods and services that were produced inside the border of India, excluding intermediate goods, during 2016.

Explanation: one of the three approaches to calculating GDP that involves adding up all spending on final goods and services in an economy; the expenditures approach categories this spending into five categories: consumption, investment, government spending, exports, and imports: Y=C+I+G+X-MY=C+I+G+X−MY, equals, C, plus, I, plus, G, plus, X, minus, M.

income approach to GDPan approach to calculating GDP that involves adding up all of the income earned within the borders of a country in a given year; the income approach adds up wages, rents, interest, and profits. value-added approach to GDPan approach to calculating GDP that involved adding up all of the value added at various stages of production; for example, in the production of a cake that sells for \$12$12dollar sign, 12, the value-added approach counts the value of the raw ingredients that a farmer sells to the baker (\$4$4dollar sign, 4), which a baker then combines with her capital to create a cake, which adds \$8$8dollar sign, 8 in value.

uncle sam would be tossing and turning in his grave : *)

worldwide, 780 million people do not have access to an improved water source. an estimated 2.5 billion people lack access to improved sanitation (more than 35% of the world's population)