How did eratosthenes determine the circumference of the earth?

Ipromise this is 35 points. but make sure your specific about the answers and know what you are talking about because my career will deppend on the grade i have in this class so keep it accurate and very specific but not fancy.1. who was the highest deity in the shang religion? a.dib.laozic.shihuangdid.confucius2. which of the following actions was a major accomplishment of the qin dynasty? a.ending the warring states periodb.creating china’s first monetary systemc.creating a system of social classesd.organizing china’s first local governments3. what was the main problem with using representative money for trade along the silk road? a.there were too many forms of currency, including cowry shells, precious stones, and silk.b.it couldn’t be used to purchase popular items, such as silk and horses.c.paper money didn’t have any value outside of china.d.few people could read at the time, and most weren’t able to read the money.