Asian Male from a very competitive high school in California
Major: Biological Sciences in Mellon College of Science
I have been working on essays for past month, very strong essays, I believe they are the best essays I have written so far!
UW GPA: 3.61
W GPA: 3.86
SAT: 1490, 800(Math 2)
ACT: 33
Courseload: AP Physics 1, AP Biology, AP Chemistry, AP Statistics, AP CSA, AP Calculus AB
ECs:
-Bioengineering research with well-known biotech company past summer
-VP of Medical Club
-DECA ICDC Finalist 2 years
-Track and Field Varsity(11th grade), JV(9-10)
-Volunteer as a basketball coach for local summer camps (200+ hours)
-Volunteer as robotics teacher at local summer camps (100+)
-Biology and Physics tutor
Very strong essays and LORs
Despite these stats, will my ECs and Essays really help me and get me a shot for admission???
TYSM 
Your extracurriculars are great but not necessarily outstanding. In general, good extracurriculars, even outstanding extracurriculars will not compensate for an unimpressive transcript. And being an asian male in STEM coming from California means they you are in a very competitive pool filled with people who have both outstanding transcripts and outstanding extracurricular accomplishments.
What really concerns me is that even your weighted GPA doesn’t seem very high. If I were to make assumption based on what you’ve provided, I’d guess that you either did relatively* poorly in regular level classes or really** poorly in rigorous courses. Neither of these situations is ideal for admission to competitive colleges. But context matters. Different schools weigh their GPA’s differently and your school may not offer a lot of AP/honors classes (though I would assume it does since it’s highly competitive). Or maybe it was just a bad freshman year (which is common and usually understood by universities).
With that said, you certainly have a shot at admission. If your essays and recs are as good as you say they are, then that’s a big win. And, to my knowledge, biology isn’t one of Carnegie’s most competitive majors (at least not as competitive as CS) so that’s a plus. At this point, your application is basically done and there isn’t much more you can/should do. I hope that you are applying to at least 1 affordable safety school that you’d be ok attending.
By relatively, I mean relative to other applicants to schools like Carnegie. So that would be mostly A’s and B’s and possibly a C. For most people, this isn’t poor at all.
*By really, I mean mostly B’s but some A’s and C’s too. Again, not that bad but not great for competitive admissions.
I thought your sat score was 1600…
My child was accepted to MCS with slightly higher gpa and scores, but fewer ECs and APs. I would say even with killer essay and LORs you are borderline…by all means apply but have multiple safer schools in your back pocket. Good luck!
No one here can read your essay or LOR, so it’s hard to say what impact they have. A vast majority of students feel their essays and recommendations are well above average so the reality is always an unknown.
I’m sure you’ve seen the MCS statistics - you’re below the 25th percentile on SAT, ACT, GPA. Grades are the top criteria and a 3.6.1 vs. an average of 3.92 is a significant hurdle to overcome. Exception application components can balance out those issues to some extent, but I’d have to say it’s a stretch. But no one knows the secret sauce that attracts an Adcom, so you’ll find out. I’d just suggest you be sure to have alternatives.