THe final two amendments to the bill of rights are the limits to power for the Federal government and outlines states rights.
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Eli Whitney used them to assemble muskets in the 19th century, it’s allowed unskilled workers to produce large numbers of weapons quick and at a lower cost and made repair and replacement of parts cheaper and more efficient
I believe it is the Fair Labor Standards Act the act was passed in 1938 it protected workers with a maximum work week (44 hours)
