I’m going to echo with the stop worrying about test prep, but work on core math skills. However, I think the emphasis should be on just helping her get better at something instead of suggesting that she has “a problem”. A B in Math Applications is not a problem, it suggest an area to improve on, but it also suggests that she can learn the material and improve.
I love math, and think everyone should continuously take math throughout their life, just to understand statistics, probability and logical thinking better. It’s a life long journey. However, for many, many careers, you don’t need to get past Algebra to have a successful career. There is no race to get to differential equations for a lawyer.
You daughter is above average in verbal skills and average in math skills. I think she’d better off focusing on her strengths, but making sure that she continues to understand the fundamentals of math.
Basically, there’s nothing wrong with being just ok in one facet and focusing on something else.
That being said, if you can afford it, and the emphasis is on trying to get better at something and not that she’s doing something wrong or is “deficient”, getting a math tutor to shore that up is good.