Answer:
They developed Trigonometry, used mathematical models to track down the planet Jupiter and developed methods of tracking time that are still used today.
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Answer:
Booker T. Washington
Explanation:
As part of the 1940 Famous Americans Issue, the U.S of America issued the 10-cent Booker T. Washington stamp on April 7, 1940. Its significance lies in the fact that it was the 1st time a former African American slave has been honored on a postage stamp in the country. Only 35 Americans were honored by the Famous Americans Issue based on their significant contributions to the different fields like that of poetry, technology, music, literature, education, art, etc and decision eventually agreed by Franklin Delano Roosevelt.
Islam in west and east europe. ISLam islam islam
