<p>general, can you post the question and exact solution for the temperature question? cuz i think i put I only for that</p>
<p>cuz i graphed the equation in my calculator and the y value gets larger and larger</p>
<p>which means the temperature will eventually aprroach infinity</p>
<p>Took it this morning. Looking at these answer explanations kind of makes me feel stupid now. I skipped at least 5 questions and guessed on 5-10. I didn’t start studying until a week after my ap exams and the barrons tests killed me as well. I’ll probably try again during junior or senior year.</p>
<p>if you keep going up it should eventually level off at y=55, or you could have just checked the table for really large values of x. </p>
<p>Anyway, you can determine this from the equation by plugging in infinity or a really large x like 10000000</p>
<p>me too. i was busy studying physics. didnt spend a single minute of math, planning on retaking it in november</p>
<p>It was functionally equivalent to this:</p>
<p>temp = 55 + 20e^(-.0231t)</p>
<p>I: At the start of the experiment (t = 0), the temperature was 75.
CORRECT: 55 + 20e^(0) = 55 + 20 = 75</p>
<p>II: Over a long period of time, the temperature approaches 55.
CORRECT: lim as x->infinity(55 + 20e^(-.0231t))
-.0231t heads to negative infinity, so e heads to 1/e^infinity, which is zero. Thus: 55 + 20(0) = 55</p>
<p>III: The temperature becomes 50 during the experiment.
FALSE: 20e^(-.0231t) can never be negative, so 55 is the minimum value of the temperature.</p>
<p>I might’ve transposed II and I. In any case, those are functionally the same things they asked, albeit in different and more direct language.</p>
<p>just curious, how many questions out of the total fifty do we have confirmed answers for?</p>
<p>I’m just guessing, but I saw answers for about 20 questions.</p>
<p>I think it’s about 30 answers. But we have answers to all the hard questions.</p>
<p>Well, I’m off for the night. If anyone else comes to the thread looking for answers, they’re definitely buried somewhere in the heap.</p>
<p>Did we do the question about the graph where it told you to find the sin of, and it was a line segment in the third quadrant…</p>
<p>answer was something like -3/sqrt(13)…or was it?</p>
<p>Yes. -3/rt(13).</p>
<p>yea pretty sure that was it.</p>
<p>Yeeaaahh…so we have about…31ish now? :p</p>
<p>don’t know if we did this question yet, here;s another one I just remembered:</p>
<p>Something with a circle graphed and which circle allows the point 1,2 to be outside it or something?</p>
<p>I believe the answer to that was something like this:</p>
<p>(x-1)^2 + (y+2)^2 = 4</p>
<p>It went to 9 = 4 at (1,2).</p>
<p>Well, I really have to go now.</p>
<p>my personal opinon was this was MUCH harder than the ap calculus exam, not in difficulty, but in scope; their’s a lot to cover and when questions get slick on things you thought were “easy” it really kills u</p>
<p>agreed. most of the questions i messed up on were not because i didnt’ know how to do them, but rather because i made a careless mistake.</p>
<p>Yeah. Who but I would forget that the formula for area of a triangle has a 1/2 in it?</p>
<p>do you guys remember the other answer choices for the point outside the circle one?</p>