Hey there. I understand your pain. Would not be possible to hide the fact that you’re Indian. It will be obvious based on your name, and your parents names. This is standard part of the common app. Instead I would try to turn it into an advantage. Portray how connected you are with Indian heritage despite growing up here. Trying to hide or minimize it will backfire.
Thanks for explaining the GPA. I was confused because you said max 3.92. I thought that your HS max was 3.92, not for you individually. The GPA looks fine honestly. The one C is unlikely to be the sole deciding factor on whether you get in or not. But be sure to explain/show how you’ve improved.
If you want to show the colleges that you’re not bad at math then enroll in some well known competitions: AIME,Math Olympiad, etc.
Regarding legacy preference at UChicago: the undergrad boost is much stronger than having a parent who attended Chicago Booth. I know examples of kids from my son’s prep school who were accepted to Chicago as legacies. In recent years they have been focused on UChicago College legacies. They also accept the grad program legacies, but not nearly as much. If Chicago is indeed your first choice then apply binding ED1.
You mentioned that your mom went to some prestigious schools. Was her undergrad at one of them (Northwestern, WashU)? If so that would give you a significant advantage over the Chicago Booth legacy.
Another point - UChicago undergrad doesn’t have a “business” major per. They are very big on being liberal arts and anti-pre-professional. In recent years they have introduced the Business Econ minor, and that has caused some friction. About a third of the entire college is majoring in Econ. So they have plenty of candidates to choose from. I would not strike a pre-professional tone when framing your application. They are looking for smart, quirky kids who have an open mind and are willing to embrace the Core. They are not looking to turn the college into a pre-professional factory like Penn, Harvard or other similar peer schools. I would instead steer your application ‘story’ away from Econ. The narrative that you put forth in the application has to reflect this. I know this might come as a surprise.