The englishman who led the expedition to roanoke was

Sir Walter Raleigh

Sir Walter Raleigh funded expeditions to establish a colony on Roanoke, an  Island off the coast of North Carolina. His first attempt in 1584 failed, the second set sail in 1585 led by John White but mysteriously vanished.  

the amount of the purse is, $120.

tax rate =9%

first find the the total tax she paid on the amount is equal to the 9% of $120 i.e,

now,

total amount paid by shalika = $120 +$10.8 = $130.8

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.