what is the total interest for $2596.40

with a interest rate of %9 percent.with a tiime of 7months
97.37
136.26
136.31
233.68
my answer is 233.68

5 answers

I = p r t
http://math.about.com/od/businessmath/ss/Interest_2.htm
so would the answer be 97.37
writeacher is the answer 136.31
Hmmm. when you use the word interest, you have to specify what that is: For instance, if 9 percent is annual interest, or if 9 percent is for 7 months (which would be almost 17 percent annual).

If your interest fee is 9 percent annual, but paid at the end of 7 months in total, then interest=7/12* 2596.4*(.09)=136.31

You have to be very precise in your problem statement, as I assure you the question as written can be interpreted as something different.
thank you