What was special about the number system used by Ibn Sina?

it depends on which society you are referring to. many civilization performed rituals so the gods would with their growing season but the most well known is that of the aztecs. they would make sacrifices, usually animals, but sometimes humans as well.

protectionism fosters competition and keeps price regulated is not an argument in favor of protectionism.

answer; does not include a reference to the audience;

answer; how about carl lewis;