What pressing problem did the invention of the cotton gin solve?
A. removing seeds from cotton fiber
B. efficiently harvesting raw cotton
C. quickly plowing the cotton fields
D. irrigating the fields of cotton plants

the answer is A .

Global climatic patterns are changing because of the melting of polar ice caps. the melting of polar ice caps is an example of the interaction between the atmosphere and cryosphere cryosphere and geosphere hydrosphere and geosphere biosphere and cryosphere

Mary starts from her house, walks 80 meters south, and stops to chat with her aunt on the sidewalk. after chatting for a few minutes, she walks 125 meters to the west to meet a friend and then walks 45 meters north with her friend to a cafe for lunch. overall, she takes 10 minutes to do all this. what is mary’s average speed?

Human population projections are subject to change due to fluctuations in global fertility and mortality rates