<p>What was the one w/ the volume of the pyramid on top of the cube? Totally blanked on the math for it...not in precalc anymore & didn't remember. :(</p>
<p>i put 112 i think</p>
<p>Hey another question</p>
<p>If I got 790 on the SAT I, & I got 700-750 on this one, will that look really bad?</p>
<p>Oh and if anyone is wndering about books I used REA & it was way too easy...I got 800 on the last two practice tests. It wasn't that I screwed up today the REA just didn't cover all the right stuff.</p>
<p>If I retake, would you all say just to work out of Barrons until I'm getting 650-700?</p>
<p>I remember the pyramid/cube question exactly...</p>
<p>The total height was 13, and the cube had a length/width/height of 4.</p>
<p>So you knew the volume of the cube [64]
volume of pyramid = 1/3(base area)(height) = (1/3)(16)(13-4) = 48</p>
<p>Cube+Pyramid = 64 + 48 = 112</p>
<p>it's negative tan of the angle for slope because slope is rise over run and tan is y / x</p>
<p>i made a few stupid mistakes: the period one was sloppy so was the triangle...</p>
<p>no dude, it's cotangent.</p>
<p>tan is x/y</p>
<p>"I remember the pyramid/cube question exactly...</p>
<p>The total height was 13, and the cube had a length/width/height of 4.</p>
<p>So you knew the volume of the cube [64]
volume of pyramid = 1/3(base area)(height) = (1/3)(16)(13-4) = 48</p>
<p>Cube+Pyramid = 64 + 48 = 112"</p>
<p>I agree with LOJT on that one.</p>
<p>dang it i knew that. but i thought i was doing something wrong (wasn't including volume of cube)</p>
<p>dream, sorry.</p>
<p>tan = sin/cos
sin is the y value, cos is the x value...</p>
<p>No, I meant that in the slope problem.
and the angle was on the top.
so in this case tan becomes △x/△y.</p>
<p>oh i miessed up no time to check work</p>
<p>LoJT: That's what I got as well. 112.</p>
<p>Ohhh, I remember that 112 problem now, yeah that's what I got too.</p>
<p>does anyone remember the question for the interest problem? I put (B) The 10% bank will be higher than the 5% bank because from what I remember it was the same amount of money, same amount of time, just different rates.</p>
<p>No, I didn't put B, I remember I crossed them all down to D and E. And then I put the one that said that the bank that paid the annual 10% would give more money first, but in the long run that bank that compounded 5% annually would be more. The reason is because in the long run you always make more from compounded interest.</p>
<p>i guess i didnt understand the question... was the difference that the 10% bank was just giving you 10% of your original deposit while the 5% was compounding annually? I thought they were both compounding annually... this is why im not good with english... i cant read</p>
<p>no, the 10% one, just gave you 10% of your original depost, the 5% was compounded (I actually don't remember if it was annually or not). But compounding is like having the money grow exponentially. I forgot the formulas but I'm sure you can easily look up "formulas for calculating interest" or "formulas for calculating compounded interest"</p>
<p>yeah... what do you think 5 omit and 1 wrong will be... 800?</p>
<p>let's see that would be a raw score of 43.75 . . . well it's possible. I hear that the raw score for an 800 can vary quite a bit</p>
<p>Okay, this is what the problem was</p>
<p>You had 1500 initially. Bank one gives you 10% yearly of your INITIAL deposit. So the formula is 1500 + (0.10 times 1500)x years</p>
<p>The second bank gives you 5% compound annually. So its 1500 times 1.05^x years.</p>
<p>if you graph then, you notice the first bank is higher initially, but the second bank later exceeds it.</p>