Official Math IIC Thread

<p>the rough raw score for where an 800 drops is around- usually averages- 44</p>

<p>the answer for the 2 sets of numbers were the standard deviation and range
i used my stats stats/lists editor the one we use in my stats class and the standard deviation was the same and the range was as well</p>

<p>iam 99% sure</p>

<p>anyone remember the logic question within the first 10 questions... it was like.. "a flag can not have more than two colors" or something.. what did you guys get for the ur answers? it was the one with like the roman numerals</p>

<p>yeah the maximum value of sinxcosx was 1/2
because 2sinxcosx = sin2x
therfore, sinxcosx = 1/2 sin2x, making 1/2 the maximum value
am i right?</p>

<p>yes chirag, the anser was 1/2.</p>

<p>I did so badly in Math 2C! Boohoo!</p>

<p>I thought of it as the maximum is when the 2 terms are equal which is at 45*. So there its squareroot(2)/2 ^2, or 1/2</p>

<p>I also got .5</p>

<p>Can we reach a consensus on the probability one?
Was it .8 or .9?</p>

<p>I put .8 for the probability, but only because I guessed. When I got home I realized how easy it was. The answer is .9 .</p>

<p>k good that's what i put :)</p>

<p>Does anyone remember the polar coordinates one? I believe the question was "Which of the following is not the same as (Pi/4,1)?" I think I put (13pi/4,1). But I wasn't sure. ??</p>

<p>I put A for the polar coordinates one. That's all I remember. Somebody please tell me if I was correct!</p>

<p>going back to the altitue of the pyramid with the bases having side length of 4. isnt the height what was given 8. it jsut asked the altituded and they gave it</p>

<p>"slicerace A 4 by 4 square base of a pyramid with height 8. Find the length of one triangular face from the center of the base to the top (paraphrasing).</p>

<p>Look at it from the side. Set up a right triangle with side 8 and side 2 (because the distance to the edge from the base is half of the total base). Sqrt(8^2 + 2^2) = 8.246"</p>

<p>it was (1,13/4pi) b/c orig. was (1,1/4pi) so adding 12/4pi to the original is adding a theta of 3pi, and 2 pi is one revolution, so u'd go 1.5 times around, so really (1,13/4pi) is the equivalent of (-1,1/4pi) but not (1,1/4pi)</p>

<p>For the polar coordinates one there were three answer choices where the r = 1 and two answer choices where the r = -1</p>

<p>The 2nd one where r = -1 worked because the angle given would make r negative. And since all the positive r values worked as well, the only one that didn't work was choice A, where r was -1. I'm pretty sure it was A as well.</p>

<p>dude, (1,13/4pi) does not work, that's 1.5 revolutions, think about it</p>

<p>"going back to the altitue of the pyramid with the bases having side length of 4. isnt the height what was given 8. it jsut asked the altituded and they gave it"</p>

<p>no no. . .they were asking for the altitude of one of the faces, aka one of the triangles.
all of the faces are slanted in.<br>
so you have a right triangle
height = 8
base = 2
4 + 64 = 68. Root of that is like 8. something</p>

<p>yea like i see what ur saying and i was abou toput that but shouldnt they ahve phrased it as what was the length of one of the faces not the altitude</p>

<p>I think the probablilty one was .8. Please explain how you got .9</p>