Questions about grades

<p>I got accepted with D's in all higher level math and science classes, I applied for computer science? (i think) or engineering, however, I have an F in calc now. Theres only a few chances to get better grades, but do you think they will take back the offer? should i drop out of calc?</p>

<p>Being a full IB diploma candidate, sprinter, volunteer and work have really taken out of time that I could use to get nice grades in a few classes instead of average/below average grades in many classes. however it is a bit late to complain </p>

<p>Before i was greatly worried about not getting into any colleges, but now that I've gotten into one that I would be very happy with, the grades become my biggest problem : (</p>

<p>On the admissions, it says undeclared even though i picked something, is this normal?</p>