I agree with Terp the Math portion needs to come up because right now you want UMich and that is an NROTC powerhouse, so it will mean academically strong applicants, even if it is your IS. You want a 31+ on M. Honestly, I am not sure if a 30 is high enough to feel safe for UMich admittance let alone an NROTC scholarship...sorry, but UMICH is also considered one of the best public universities in the nation. If they are like UVA or UNCCH, it could be a low match, see below for my reason.
The other issue that I will remind all jrs. asking a chance me is 3.97 doesn't tell us squat unless you tell us out of what? 3.97 cgpa uw, WOW, and my congrats because that is out the door amazing. 3.97 on a 4.5, still strong, but the WOW is gone. 3.97 out of 5.0 pull it up.
This is also why some will ask your rank instead of out of what weight 4.0/4.5/5/0. It gives a different perspective.
Remember as an NROTC candidate you are competing against not only every candidate that is applying just NROTC, but also for an SA slot. Many candidates also will apply to multiple SA's and multiple ROTCs, especially those who want to fly. You need to always place these people into your equation when asking for chances.