Settlers at jamestown found unexpected success by:

by growing tobacco.

Explanation:

Jamestown was the first British settlement founded on a permanent basis in the American continent on May 14, 1607, in the present American state of Virginia.

The settler John Rolfe introduced a lineage of tobacco, which was successfully exported in 1612, and the financial prospects for the colony soon became very favorable when settlers developed a monoculture of tobacco. Two years later, Rolfe married the young native Pocahontas, daughter of Wahunsenacawh, head of the Powhatan Confederacy, following a period of relative peace between settlers and natives.

more than 65,000 union soldiers had been killed that summer.

more than 65,000 union soldiers had been killed that summer.

more than 65, is the correct

copernicus finished the first manuscript of his book, "de revolutionibus orbium coelestium" ("on the revolutions of the heavenly spheres") in 1532. in it, copernicus established that the planets orbited the sun rather than the earth. he laid out his model of the solar system and the path of the planets.