What new business practices did the merchants introduce in muslim lands ?

Merchants built a vast trading network across most of the Muslim lands and introduced many business practices that helped Muslim lands to prosper and become rich. Merchants introduced many different cultures upon travelling from one place to another for trade. Merchants introduced the ideas of banking along with partnerships. Merchants also brought the Indian number system, which spread to Europe and Muslim lands, later came to be known as Arabic numerals.  

lincoln declared that slavery should not be allowed to spread into the new states, and of course this angered the south at the time.

maybe you need to work on the pipes in the house. i am just saying this because you did not give any details.