How business mathematics can help you in making decision about investment in a business.
Since this is not my area of expertise, I searched Google under the key words "business math to evaluate investments" to get these possible sources:
https://www.google.com/search?client=safari&rls=en&q=business+math+to+evaluate+investments&ie=UTF-8&oe=UTF-8
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.