<ol>
<li><p>That’s right. The core requires 1 math course to meet the requirement unless you want to fulfill the math requirement with calculus, in which case you need 2 quarters. If you took, say, Statistics, you’d only need 1 quarter, but then you’d need to take an additional quarter in the biological or physical sciences.</p></li>
<li><p>Not really.</p></li>
<li><p>No clue. As JHS said, AP elective credit isn’t something that will matter much either way, unless you’re set on graduating early or taking fewer electives. </p></li>
<li><p>I think college credit would be counted separately in most cases.</p></li>
</ol>