<p>you set the integration equal to the whole area divided by 2 right</p>
<p>Man, I was hoping for a 5 but at this rate I may have gotten a 4.</p>
<p>i set it on the integration dy but i think i might have messed up on the limits of integration but i dont think i did</p>
<p>i remember doing a similar problem on one of my full practice tests so i probably got at least 3 points on part c if im lucky i probably got them all</p>
<p>For 5c) why would it be -ln(abs(100-B))?? When I separated variables I ended up getting a positive ln(abs(100-B))=(t/5)+C because dB/(100-B) → ln(abs(100-B))=(t/5)+C, right?</p>
<p>Because of u-substitution. </p>
<p>u= 100 - B
du = -dB</p>
<p>So you need a negative on the outside of the integral too.</p>
<p>Various AP Calculus teachers are posting their solutions to the FRQs on this forum here:
[Math</a> Forum Discussions - ap-calculus](<a href=“Classroom Resources - National Council of Teachers of Mathematics”>Classroom Resources - National Council of Teachers of Mathematics)</p>
<p>Anyone getting the error “file does not begin with %PDF” when trying to open the free response questions. On 3 d) i said that the inflection points occur x=-2,0,1 because they are rel max/min of f’(x). I did not say anything about f(x). Will I lose a point here? Also, I forgot to put the absolute value on 5 c after integrating. Is that a point off too?</p>
<p>99% sure i got 40+/45 on mc. Predicted free response scores 9/6/8/9/7/9. Definite 5 yay</p>
<p>I am also getting the error message! I went to go look up the questions since I think I may have received the different version of the free response.</p>
<p>hmmm okay two questions…
- if you put justification but you have the wrong numerical answer is it worth any points?
- does the total distance equation include the constant? most people in my class put integral of abs(v(t)) + initial position.</p>
<p>thanks guys!</p>
<p>predicting a four (hopefully didn’t bomb the mc). i totally effed up frq 3. :(</p>
<p>On question 3 if you have the wrong answer but correct justification, you should get the points for the justication and not the answer</p>
<p>The total distance does not include the +initial position. abs(v(t)) + initial position represents the total displacement.</p>
<p>I think I definitely got a 5…the mc was almost too easy. The only question I think I got wrong (other than maybe one or two others due to math errors I didn’t catch) was the streetlight one…and it was such a simple answer too! Gah. The free response was more challenging, but I think I got above 7’s on every one, probably 9’s on three or two of them. My AP class was really good, we did all the available multiple choice all the way back to 1988. and all the available free response almost twice. I got a 5 on all the tests we did. So that’s why I’m so confident.</p>
<p>question regarding number 2 part c…</p>
<p>I was not thinking while doing this question and didn’t think to change it into dy’s but i think my answer may still be right</p>
<p>I said 1.49 (1/2 the area found in part a) = ∫ (lnx-k) [from e^k to 3.693] + ∫ (5-x-k) [from 3.693 to 5-k]</p>
<p>I’m getting the same error!</p>
<p>Sent from my YP-G70 using CC</p>
<p>julieannab The right answer to the related rates problem with 6ft man was 2.667 i heard many of my friends who also took the test had problems with this<br>
do you remember the problem right before the 6 ft man i think it was an optimization problem
becuz thats the one i had trouble with i guessed it was 2</p>
<p>Why doenst the link for the frq work for me? Am i the only one</p>
<p>on #6 part B I said Abs(V(t)dt) instead of Abs(V(t))dt</p>
<p>will this cost me points???</p>
<p>@rameshwar I really don’t believe so because dx and dt and all that stuff wouldn’t even cost you points if you forgot it. dont worry</p>
<p>wasnt 2.6666 choice c</p>
<p>It was choice B</p>
<p>Btw, I calculated my grade on ap pass and im basically between a 72 and 75. With a harsher curve would that still be a 5? </p>
<p>Anyone else realize how much they messed up now that the questions have been released. For the semicircle i forgot to divide the area I got by 2!!! I’m so angry at myself for such dumb mistakes.</p>