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How did robber barons create monopolies in the United States in the late 1800s
answered
Dec 15, 2018
History
high-school
3
votes
117k
views
List three steps that show how the sun provides energy for surface ocean currents
answered
Oct 21, 2018
Advanced Placement (AP)
middle-school
1
vote
227k
views
In caves, dripping groundwater containing calcium bicarbonate can form stalactites and stalagmites. When the water is exposed to air, some of the calcium biscarbonte turns into calcium carbonate, which
answered
Apr 9, 2018
Chemistry
high-school
3
votes
184k
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