<p>ysk1, I misspoke a bit, I just found one related rate question in the Section II of '03 (not form B), but it's really not bad</p>
<p>The most recent multiple choice I have is '03. :( Section II-wise, that was the only one from '98-'06.</p>
<p>I'd go with Tccc061990's estimate just to be safe, but even that seems a little much</p>
<p>Check AP Central (and if you still can't find the information you need, contact the College Board). To the best of my memory, related rates are tested in only <em>one?</em> free response question, and almost never in the MC. With regards to those volumetric formulas, I second Goldshadow's comment that it would be a fine idea to get them memorized. You'll need them at some point in your life, and hey -- they're not that hard to memorize (thirty minutes spent should be enough). Get to it!</p>
<p>I did a Peterson's BC practice test and I saw only one related rates question on the MC and none on the FR section. Will it be like that for the actual exam?</p>
<p>It's really hard to predict anything on any test for most of time. Other than fact that AP FRQ includes Series every year (at least from ones I saw), other questions are pretty hard to predict. Related rates is just one of the possible ones along with parametric, polar, veloctiy/acceleration integration/differentiation, volume/area, etc...</p>
<p>Just practice for all of them and you should be good..</p>
<p>Could anyone tell me the most commonly used geometry formulas for related rates? I know none, except pythagorus triangles. I always mix up formulas for circumference of a circle with volume of a circle, and volume of a cone with an area of a cone, etc. Geometry formulas are all really similar to each other, so it's hard to remember all of them precisely. :'(</p>
<p>Those are basic formulas you really should have memorized by now. I'm sure a google search or any math book will have them.</p>
<p>I have done practice questions FR and they give u the formula and sometime a picture of the shape sometimes. Like in the question it will say a cone, and then given that V= (formula for cone) And other info. And it is not that hard to know the formulas- if ur in an AP class u should know by now.</p>
<p>
[quote]
...And it is not that hard to know the formulas- if ur in an AP class u should know by now.
[/quote]
I self-studied BC. So should we know about volume and area of sphere, cone, and cylinder?</p>
<p>It's something you should essentially know coming into high school and from algebra/geometry/trig classes.</p>
<p>Well, it kind of makes since that AP kids tend to forget things they learned earlier more easily XD ... at least it applies to me (and apparently ysk1 too =P)</p>
<p>This should be everything for Volume and Surface Area of solids (assuming you know how to find the areas of circles, squares, rectangles, etc):</p>
<p>Volume of pyramid and cone: 1/3 * area of the base * height
Volume of sphere: 4/3 * PI * r^3
Volume of prisms: area of base * height</p>
<p>Surface Area of sphere: 4 * PI * r^2
Surface Area of cone: area of the base + (PI * r * slant height) <-- weird formula >_<
Surface Area of prisms/pyramid: sum of all the faces</p>
<p>lucidity: You're awesome. Thanks. :)</p>