Australia is a developed country and one of the wealthiest in the world, with the world's 12th-largest economy. In 2014 Australia had the world's fifth-highest per capita income. Australia's military expenditure is the world's 13th-largest.
The third largest country of the world, the United States of America is located in North America between Mexico and Canada.
How Many States Are There in the United States of America ? There are 50 states in United States of America.United States comprises 50 constituent states and one district. It is located on the North American continent. When the country gained independence from the rule of Great Britain, it had only 13 states.