This summer I am taking an online course due to being part of an internship 1000 miles from home. That said, the physics course I am taking the instructor is not grading the tests right. When asked what the right answers are, she responds but then when I ask about the specifics of why I missed them she ignores me.
For example this question,
"An elevator weighing 20 200 N is supported by a steel cable. What is the tension in the cable when the elevator is being accelerated upward at a rate of 3.00 m/s2? (g = 9.80 m/s2)"
She responded that the answer is T = 26383.7 N, then gave me zero points when I wrote 26400 N which seems more correct given significant figures.
However when I asked about it, she ignored me.
Because of this kind of thing my test grade went from a 100 to a C-.
What else can I do?