An economy that is based on mining or producing raw materials to be used in foreign industries is called an "extractive economy", since it is "extracting" such resources. It can also be called a "resource-based" economy.
Question 1: They developed a decimal system with a numeral for zero.
An important development in mathematics during this period was the decimal system notation. The powers of ten with null coefficients were used in order to indicate "zero."
Question 2: Chandragupta II
Chandragupta II was one of the most powerful emperor of the Gupta Empire. Under his rule (c. 380-c. 415) the Gupta Empire reached its greatest size. He was a great supporter of the arts and his rule is often referred to as the “Golden Age” of India.
Question 3: Chess
Chess is believed to have originated in India during the Gupta Empire in the 6th century. Afterwards, it spread through the Silk Road.
One of the most important elements of the Northwest Ordinance of 1787 was that the Federal government would be sovereign and would expand westwards in hope of founding new states, instead of expanding existing states. This was important for the growth and expansion of the United States (had this not happened, the United States would not be half of what it is now). Another important aspect of the Northwest Ordinance of 1787 is that slavery was prohibited and this was basically the border between free and slave states.
