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The United States of America ( U.S.A. or USA ), commonly known as the United States ( U.S., US or the States ), or simply America, is a sovereign country mostly in North America. It is divided into 50 states. Forty-eight of these states and the District of Columbia border each other between the Pacific and Atlantic Oceans.
The U.S. economy is heavily dependent on road transport for moving people and goods. Personal transportation is dominated by automobiles, which operate on a network of four million miles (6.4 million km) of public roads, [340] including one of the world's longest highway systems at 57,000 miles (91,700 km). [341]
6 oct. 2021 · They estimate that 50 percent of world GDP in 2015 was produced in countries whose currency is anchored to the U.S. dollar (not counting the United States itself). 3 In contrast, the share of world GDP anchored to the euro was only 5 percent (not counting the euro area itself). Moreover, since the end of the Ilzetzki et al. sample in 2015, this anchoring has changed little. One exception might ...
Large denominations of United States currency greater than $100 were circulated by the United States Treasury until 1969. Since then, U.S. dollar banknotes have been issued in seven denominations : $1 , $2 , $5 , $10 , $20 , $50 , and $100 .
29 oct. 2021 · The United States no longer produces the half-cent coin, the two-cent coin, the three-cent coin, the half-dime coin (different from the nickel), or the twenty-cent coin. U.S. Dollar Bills There are seven denominations in bills still being printed: $1, $2, $5, $10, $20, $50, and $100.
The United States is a leader in the development of artificial intelligence technology and has maintained a space program since the late 1950s, with plans for long-term habitation of the Moon. [304] [305] In 2022, the United States was the country with the second-highest number of published scientific papers. [306]
The United States dollar coin was originally based on the worth and appearance of the eight-dollar coin or the Spanish dollar, commonly used in Spanish America between the 16 th and 19 th centuries. The United States Mint, established in 1792, issued the first dollar coins. The coins were similar in scale and composition to the Spanish dollar minted in Peru and Mexico.
