In my freshman classes I have almost never met anyone fresh out of high school who knew *** from shinola about calculus, no mattter what they got on their AP exam. One exception was this semester a kid with 5's on everything did get an A from me.
To be more precise he got a B on every test and an A- on the final and I cut him some slack and gave him the A.
So the real question is "how good does any grade at all on an AP test look?"
Frankly it does not mean much in college. high school in most places (except maybe Andover and Exeter and the Bronx high school of science, and even those back in the 60's but probably no more), is mickey mouse compared to any decent college, and that includes AP courses. AP courses are simple minded standardized test preparation. College courses are also about understanding concepts and proofs.
So I do not hold it aganist a student that he did not learn diddly in high school since his teacher probably did not know diddly and besides his parents wanted him to get a high score on the AP test and get, into a "good college" rather than learn something.
So they all come to us pretty much alike, naive, knowing zippo, some with AP some without, and it is hard to tell the promising ones from the unpromising ones. That distinction emerges after they have been exposed to some real math, not the trivia they peddle in high school as "AP BC, Blah blah".
Warning:
This is the professors' viewpoint. the admissions office has a different one. They also do not know squat about academics, and are more or less like the high schools and the parents. so getting past them and getting in is one thing, succeeding in the courses afterwards is quite another.
encouraging??
don't worry. scores do not mean a THING! once you get a real opportunity, TAKE IT! and you will be a roaring success.
best wishes,
old guy