<p>good, thats exactly what i got</p>
<p>i have the same question as diablo II. did anyone else get y=x?</p>
<p>the question was what it was symmetrical to, so the answer is that its symmetrical about the origin</p>
<p>yes definiton of inverse of a funcion in y= form is switching the x and y variables, therefore the function is reflected over x=y line, however, if it is symmetircal over the line y=x then it will only look as one function.</p>
<p>symmetrical about the origin means that if you pick a point on the funtoin and place a line though the origin it will hit another part of the funtoin with the origin bisecting the line, ex. y = 1/x</p>
<p>wait so was the answer E? (or it might be D, i forgot i know it was one of the last two)</p>
<p>Guys what did u put for the circular cone that is formed by rotating a triangle about the x axis </p>
<p>I can't remember what i put but the triangle's length's were like 2 and 3</p>
<p>it makes a right cone with a base of whatever the y value was squared multiplied by pi and the height would be the x value, to find area, multiply both those by each other and the constant 1/3</p>
<p>h=2 r=3</p>
<p>plug into cone formula V=1/3PI(2)(3)^2</p>
<p>I think it was E, diablo. That's what I put (y=x). D is y=-x.</p>
<p>I thought it was y=-x. The graph of y=x is symmetric across y=-x, too.</p>
<p>they weren't asking for that just the inverse of f(x) = f^-1 (x) if and only if both functions are symmetrical about the line y=x.
100% sure</p>
<p>what was the one "counter(something)" proof question?
EDIT: it was like (n-2) and (n+2) are prime then n is prime, what is the ...?</p>
<p>What was sin(theta) of the triangle?</p>
<p>ok, i had no prep at all (our school sucks, so i haven't taken trig or precalc yet, they make us take AP statistics before trig and precalc........) and i probably got a 750 or so for math2c , worst case scenario 730, i ran out of time so i had to skip a lot</p>
<p>should i just cancel my score? does 730--> 800 look approximately the same as a one time shot and getting an 800 to colleges?</p>
<p>ty</p>
<p>sin(theta) question used law of cosines, idk what ur counter something is.</p>
<p>aright you guys, i skipped 11, and judging from these posts, I got one wrong. I didnt prepare too hard, so should i write a letter to collegeboard and cancel by wednesday, or retake in September? I'm kinda leaning towards retaking in September, but how bad would that look to colleges?</p>
<p>Ihope:
The counter-proof was 13, I think. 13-2=11=prime, but 13+2=15=not prime. All the other choices gave primes.</p>
<p>well, would you be content with a 730 (+/- 20 points), cause thats what i think you'll get. Now if you do cancell, I wuld suggest retaking b/c this is the SATII that is required by the most colleges. If think you can do well (800), why not go for it?</p>
<p>The counter-proof was definitely 15. The thing said if you add two or subtract two and both are prime, it must be prime, and since 15-2=prime, 15+2=prime, and 15 is not prime, it disproves it. 13 doesn't work because 13+2=15, which is not prime.</p>
<p>I concur with drummerdude_07.</p>