Which became president after lincolns assassination, he was also impeached during his presidency but not convicted?

answer; ///i believe that the correct answer is refrigerants,(like r12) and aerosol

thomas jefferson is the answer

while it was true that the cotton gin reduced the labor of removing seeds, it did not reduce the need for slaves to grow and pick the cotton.

explanation:

before eli whitney's invention of the cotton gin, picking and cleaning cotton was a slow, labor-intensive job. workers, usually slaves, had to pick the seeds from the cotton fibers by hand. this invention made it possible to grow large amounts of cotton on big farms and make money.