What I'm about to say comes with a caveat (what kind of consultant would I be if I didn't?!
). Don't worry about the B-. Given your quant score and the fact that you feel a B- is rough leads me to believe your overall GPA is probably pretty good. Right? If I'm wrong, then that's a different conversation but I'll wait for you to disagree first.
Between your 50Q and the fact that you took Calc II no school will be wondering if you can hack the math side of things. As long as you understand what a differential is and how to calculate it, you should be fine.
Like I said, if I'm wrong, let me know and we can take it from there!
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