<p>@whitesox137 I’m guessing the cutoff for a 5 will be right around a 65/108. The cutoff in 2008 was 69/108 and people are saying that this test was harder than that one</p>
<p>Wasn’t there like a penalty for guessing on the MC back then or something like that? Is that grading scale revised for that or what?</p>
<p>I got the easy one, and may i ask whether the cutoff for a 5 will be the same as the hard one? cause i really think i can get a 80s in this.</p>
<p>PGD2013:</p>
<p>I remembered the graph of f in #5 and copied it down just now. It was a triangle with base at -6<x<-2 with vertex at (-4,5), then a semicircle at -2<x<2 with the half of the circle above the x-axis, and then a straight line from (2,0) to (3,?). The ? was a negative number, but I don’t remember what it was. Probably like -1. But anyway, I have all that but I don’t remember what the function for g was. It was like g(x) = int(f(t)dt) from -6 to something. Also, I don’t remember the initial condition they give us or what value they asked for.</p>
<p>This might be a really stupid question but can someone tell me what the deal is with Form E? I always thought APs were all the same across the board and at least for my school everyone is always issued Form O, but this year some of us in Calc BC (including me) got Form E.</p>
<p>Do the two forms have the same curve? Which one was harder?</p>
<p>Also Form E is the one without the gravel question. I don’t remember a ton about it but the first FRQ was on volume and one of the other ones was on gigaliters of water, I think.</p>
<p>JohnAndTequila:
Thanks. I’ll just hope I got that one right and didn’t make a simple arithmetic error. I have a couple other questions. On the multiple choice, do you remember the one where it had a cube (with side lengths x(t)) such that its rate of change of volume was proportional to it’s surface rate of change of area? It had a factor of -1.2 in all the answers. And I’m curious if you remember what you put. I chose the A’(t) = -1.2t^2.
Also, toward the beginning of the multiple choice section, there was a piecewise function graph and it asked you to compute the integral from 0 to 3 of the absolute value of f(t). The area by geometry was (5/2), but there was an answer that said it was nonexistent. I’m wondering if that was the answer because the graph wasn’t continuous.</p>
<p>xamanda: You had the same form I had. I talked about, previously in this thread, my answers to the FRQs by memory since the College Board only chose to put up the other form. I hope you can remember some I didn’t remember.</p>
<p>I’m wondering if anyone made the same mistake I did.</p>
<p>On 5c where you had to solve the differential equation, I separated variables correctly, to make it look like (integral)dy/y^2 and (integral)(2x+2)dx. But AFTER that I decided to integrate the (2x+2) as one variable. As in I made it 1/4(2x+2)^2 rather than 2x^2 +2x. Anyway, that probably cost me 3-4 points out of 9 on that FRQ (which I thought was probably the easiest).</p>
<p>PGD2013:
I had the same form as you, and I think the cube one said that rate of change of volume was proportional to surface area, not rate of change of surface area. I don’t remember what I put though…</p>
<p>With that integral that had discontinuities, did you put nonexistent?</p>
<p>Did anyone have form G? I thought it was really easy.</p>
<p>can we may be talk about MC instead of FRQ?</p>
<p>Does any one remember the multiple choice question where it was like this is the graph of f (had a discontinuity), which one could be the graph of f’ ? Was the answer to it the graph where there was a vertical asymptote?</p>
<p>chandlersyf - we are technically not supposed to discuss MC, although I believe this test will be released later this year. Only released MCs can be discussed.</p>
<p>Maybe I’m thinking of form O I forgot but it was really easy.</p>
<p>PGD2013:</p>
<p>For the surface area one, I tried and tried to get the answer but I just couldn’t. However, I knew that surface area is the derivative of volume, and since the volume was a cubed function I also chose the 1.2t^2, but it was just an educated guess.
And for the area under the discontinuous function, I did not put nonexistent. I remember a few days before in class we had a practice question similar to that where the area did exist.
So yes, I did put the same answers as you for those two.</p>
<p>for question number 1, part d:
technically we have to also check the endpoints, since its a closed interval right?
the time for the max is correct, but they give us points for checking endpoints too?</p>
<p>darkefyre:</p>
<p>I put 5/2 for that one since you can break up the integral and use one-sided limits. The nonexistent choice was tempting though.</p>
<p>JohnAndTequila:</p>
<p>Sounds good–thanks for giving me your input. Any other questions/issues anyone has? I’ll be glad to help since the College Board didn’t posted Form E.</p>
<p>*didn’t post</p>