Answer: 1738
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The first president of usa was George Washington.
George Washington was born in February 22, 1732 and died in December 14, 1799. He became president in April 30, 1789 and stopped being in the term of office in March 4, 1797
The lands of Africa were not explored at this time due to disease, foreign malitias, and transportation. They also were very secluded to their lands during this time.
Alfred Marshall is credited with first using cost benefit analysis