***Official AP Calculus BC Thread 2014-2015***

@Oblivion96 Yep, k=10

dat related rates problem doe…

@ayraify

Don’t worry too much. CC is well-known for its ultra competitiveness, lol.

I am the only one doing BC in my school, and I have to take the exam with people doing just AB. Before we took the test, our teacher keep saying that the test is designed for 4 hours and don’t just sit there and do nothing or you will get very bored. He even come up the testing room before we start and said all these BS to the class again and even the proctor said kind of the same thing to us during the break. At first I just feel like what the hell they are talking about. But you know it is just how funny when it get to the FRQ part, I was trying to look at the clock, and it is only like 5 minutes since we’ve started and everyone in my sight has already given up and started to sleep or staring at space or doing whatever.

So you know, don’t worry too much, there have enough people give up so easily that will make the curve generous for us. And really, the curve is not gonna to change that much throughout years, you will be fine if you have above a 65-70%

What was the concavity in quadrant 2 one about??? I got all positive but that was a total guess.

I feel lonely with form G lol.

@JuicyMango Sounds fun, something to be remembered for. As for calc based-statistics, it is an actual course, considered to be more difficult than AP Stat. I’d imagine it would be a requirement for Econ or something. Probably not the bio or chem major I’ll probably go for.

I got -10 for k because the top had a double negative and so k+10 =0 but idk

Slope field questions dannk afff

@beavergod I also got -10

@JuicyMango Points in quadrant two would always get you a positive second derivative.

@JuicyMango All positive yeah, good guessing lol

yup. endpoints weren’t minimum tho so your local min was your answer.

But of course stupid college board gives you 2 points or so for considering and evaluating the endpoints XD

Anyone know how to do the overflow integral for the water pipes. Is it just the integral of the difference rates less than or equal to 50?

Maybe I did get -10, hmm, don’t remember too clearly.

@accidentalprone: Aw man that’s disappointing…such an easy solution too :/. Now I’m really scared cause I missed 3/4 parts of that FRQ 5. How do you think other people did on that one? Am I the only one who messed up?

@beavergod You do 30 + the difference integrated from 0 to w is 50, or the integral is just equal to 20.

@beavergod Well you started with 30, so 30+integral = 50.

I think I got like 2 or 3 ish for the pipe time because its value was the lowest of like 18 or something as opposed to 28 or 27.

@accidentalprone what did you get for m and b? I got 1 for both but I’m not sure…

@Picarat Yeah, the related rate on lol. I spent like half the allotted time on that problem because everything else was super easy. I literally did that one problem at least 10 times, still got the wrong answer. Facepalming hard lol.