Find the simple interest on the amount of $3675 at 25/3% p.a from 10th December 2011 to 4th may 2012.
I'm afraid we can't actually do your homework for you. However, we have some online aids for you--try Tutor.com for the math problem; it provides live help for every level of homework (you will need your Omaha Public Library card number). This site might also be helpful, and does not require a library card:
You might also try a google search for "how to calculate simple interest," which is how I found the interest calculator.
I hope this helps. Good luck!