Anonymous wrote:OP this is not a big deal.
Start tutoring to get her caught up.
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She's not applying to engineer or any other math major she's totally fine.
Even is she plans to be an engineer it is fine. My own kid had a B- first semester of calc BC (had 1 A- in HS, only nonA ever until that point) and really it was a C+ but she was really close and teacher likes her and knows she was trying. Kid got a B+ 2nd semester. But what really matters is that my kid easily got a 5 on the BC AP test and is getting an A in Calc 3 at college. First time my kid has had to work for any grade. Calc is hard. But my kid learned the material and is doing great in Calc 3, so as long as her DD gets a tutor and keeps working hard, she is fine