I received the responses from Arizona and AIM program today.
Arizona:
We have a very strong group of applicants this year, and if you have an offer from another institution, it might be the most prudent course of action to accept it. A final decision on your application to the Program in Applied Mathematics at The University of Arizona may not be made until mid-April.
Michigan AIM
I apologize about our timing, but we will not be able to make any decisions this week. I can only say for certain that our process will be finished by April 15. Judging from the urgency of your message, I suppose you are trying to decide among several offers of admission; I wish you good luck with your decisions.
Does this mean that my chance is low? :x