Were Carl Linnaeus and George Washington alive at the same time?
Yes. Carl Linnaeus and George Washington were alive at the same time for 45 years, from 1732 to 1778.
Carl Linnaeus was 24 when George Washington was born.
George Washington was 45 when Carl Linnaeus died, aged 70.
Carl Linnaeus
Swedish botanist, physician, and zoologist (1707–1778); developed the foundations of modern taxonomy
Born 23 May 1707 · died 10 January 1778, aged 70
George Washington
Founding Father and first U.S. president
Born 22 February 1732 · died 14 December 1799, aged 67