They reduce the time (by making it faster) and reduce the cost of trading (by making it efficient).
Answer:
The first amendment should protect you from getting arrested.
The developed a division of labor so that people could help to do there own jobs and not interfering with others.
Answer: yes, there is that type of theory.
Explanation: it was the first theory that explained about a ramp that was built on one side of the pyramid and as the pyramid grew, the ramp used to move the blocks up to the top.
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