Important progress was made, such as full development of the decimal place-value system to include decimal fractions, the first systematized study of algebra, and advances in geometry and trigonometry. Arabic works played an important role in the transmission of mathematics to Europe during the 10th to 12th centuries.
Sure hope this helps you :)
I'd say that they got it from exploration, really.
1:Calvin Coolidge
2:Warren Harding
3:Herbert Hoover
Answer:
It was necessary because, it ratified in 1868 granted citizenship to all persons born or naturalized in the United States.
Explanation:
a unitary system is lead by one governing system
federal gives authority to state and local systems
