Are intro classes curved?

Hi everyone,

I’m currently a freshman and was wondering if past students/recent alums know from their experience if intro classes (such as LS1a or Math Ma/1a/1b) are curved. From the syllabus it states that anything above a 90 is guaranteed an A-, but I was wondering how they differentiate between an A- and A. Thanks!

This from LS1a syllabus

I imagine those students who’s overall score is closer to 100 get an A, while those closer to 90 get an A-.