Okay, so I’m just a student, so I may not be right or wrong…who knows?! 
but ill try my best to give you my input:
Your numbers are good!
Your extra curricular- I have no idea(I’m completely different than you when it comes to this so I cant really compare you to the “pool”). But in my terms, its not too many. BUT, the fact that you anchored is an interesting factor!!
Your number of AP’s, cant say anything but avg student at tech takes 6-11. So a little on the low side, but since you have gone to an international school-its understandable. Plus, tech will also compare you to your different schools. They’ll see how you did at school a compared to the school pool and etc.
ACT good (I got the same, but in SAT conversion)!!
All in all, I think you have a shot! You have an excellent science/math background. Good luck!
P.S. if you want more “reviews” try collegeniche. And you can fill out your info and ppl will tell you what they think your chances are and what you should work on.
But keep in mind, that any of us could be wrong regarding your chances.