Answer:
The value of pi helped them calculate the circumference of Earth. The value of pi helped them explain that Earth is a rotating sphere.
Explanation:
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To ensure a separation of powers, the U.S. Federal Government is made up of three branches: legislative, executive and judicial. To ensure the government is effective and citizens’ rights are protected, each branch has its own powers and responsibilities
Explanation:
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Answer:
New technologies and methods, such as improved fertilization and crop rotation, greatly increased food production.
Explanation:
This increased agricultural efficiency meant that less people were needed to work on farms and more could seek employment in growing urban industries
The economic foundation for the coastal countries of west and central Africa is the export of natural resources, such as petroleum and precious stones: diamonds. For example, in Nigeria petroleum makes up more than 90 % of Nigerian exports.
