Answer:
They originated in India in the 6th or 7th century and were introduced to Europe through the writings of Middle Eastern mathematicians, especially al-Khwarizmi and al-Kindi, about the 12th century.
Explanation:
then it spread to asia, africa
Answer: Muhammad showed them miracles and they started believing in Islam.
Explanation:
All you need to do is translate in or ask your library for help
It would have been way harder to trade and travel
To be honest I don't think this is worth stressing over you get to meet a great person who did a lot to make this future I think the best thing you could do is stay respectful and just say it if you feel the need to. Thank you so much. It doesn't hurt if you do your research on that specific person if you want to ask about specific events they were involved in