Eli whitney's cotton gin allowed times more cotton to be processed daily.
a. two
b. fifty
c. ten

Write a short paragraph of about 150-300 words. explain how the physical environment can limit human activities.

Which of the following is not a place where hydrogen can be found on earth? a. natural gas well b. atmosphere c. water d. mine

Which movement developed in the early 1900s and encouraged the nationalist spirit of africans throughout the world? a. african nationalist b. tribalism c. pan-africanism d. african union