Communication Needs

what is the difference between expository essays and business communication and how are they alike?

i need to respond to a question for school but i need some help. i need to know whta the difference and similiarities are between expository essays and business communication. I need to know what part does fact and opinion play. Please give me some kind of help.

Public Comments

1. http://en.wikipedia.org/wiki/Expository_writing http://www.stanford.edu/~arnetha/expowrite/info.html http://sbinfocanada.about.com/od/smallbusinesslearning/a/bizwritingpj.htm