Know about Countries -The United States
The United States
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President: Barack H. Obama (2009)
Vice President: Joseph Biden (2009) Land area: 3,539,225 sq mi (9,166,601 sq km); total area: 3,718,691 sq mi (9,631,420 sq km) Population (2010 est.): 310,232,863 (growth rate: 0.9%); birth rate: 13.8/1000; infant mortality rate: 6.1/1000; life expectancy: 78.2; density per sq mi: 85 Capital (2003 est.): Washington, DC, 570,898 Largest cities (2003 est.): New York, 18,498,000 (metro area), 8,085,742 (city proper); Los Angeles, 12,146,000 (metro area), 3,819,951 (city proper); Chicago, 8,711,000 (metro area), 2,869,121 (city proper); Houston, 2,009,960; Philadelphia, 1,479,339; Phoenix, 1,388,416; San Diego, 1,226,753; San Antonio, 1,214,725; Dallas, 1,208,318; Detroit, 911,402 Monetary unit: dollar The Fifty States![]() Info Courtesy Infoplease.com
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The United States of America
Government
Federal republic.
The president is elected for a four-year term and may be reelected only once. The bicameral Congress consists of the 100-member Senate, elected to a six-year term with one-third of the seats becoming vacant every two years, and the 435-member House of Representatives, elected every two years. The minimum voting age is 18.