He was a president not a vice president
When Russia was under Mongol domination, the effect on Russia was to: <span>Keep Russia isolated from Western Europe
Back then, the Mongol realized that the Empires from Western Europe (Such as the Birth and Spaniard Empire) Posed a threat to the Mongols.
The Mongols isolated Russia from these empires because they wanted to keep Russia weak and unable to form an alliance with them.</span>
C. the economy was mainly agriculture and needed many people to work in the fields
Rene Descartes was a key figure in the scientific revolution and had some stuff to do with math so probably him ( don't hold me to that and check other peoples answers)
