<p>What did you guys put for the 2 sets of numbers, they asked if they had the same range, mean, and standard dev. I think they had the same range, did they have the same standard deviation too?</p>
<p>What was the answer to the question about the two spheres, one with a radius of one the other with a radius of 11 and you had to figure out the volume between them? Does anyone know what I am talking about?</p>
<p>spheres was like 5 thousand something (i think the first 5xxx one which was D)</p>
<p>and the one about ranges etc. they only had the same standard deviation (difference from each other)</p>
<p>They had the same range....</p>
<p>Range is the Highest number - the lowest... </p>
<p>8-0 = 8
11-3 = 8</p>
<p>I ****ed up and didn't put the same STd though =/ so I get it wrong too</p>
<p>The graph repeated every 7 units and it started at -3. 7*14-3=95, so count up 5 more from where it starts, giving you f(100), which was 1.</p>
<p>my bad. you are correct in the ranges. i was busy moving that the simple things a.k.a. ranges blow right by you (i was thinking Y ranges lol).</p>
<p>i think that the standard deviation is the same too</p>
<p>Two questions:</p>
<ol>
<li>I omitted 4, guess around 8, probably got like 4 more wrong. Any chance for 700?</li>
<li>For the last 4 problems, I guessed C. Any chance of being correct on any of them?</li>
</ol>
<p>thanks</p>
<p>Here's the 22 reals Table...</p>
<p>43 - 800, 790, 780, 770, 760, 750, 740, 730, 720, 710..
33 - 700</p>
<p>w00t!! I got the range/StD problem right! Wow, I'm really excited about my performance. I screwed up on the easy geometric sequence problem (I forgot the r^n-1 part...) so I omitted. But otherwise my other omits were fine and I got all the "hard" ones right so far.</p>
<p>What about the question with circle (x-12)^2 + (y+5)^2 = 16
and what was the distance from the origin to the circle or something?</p>
<p>the distance was 9.
13 from the center to the origin minus for of the radius</p>
<p>ah i see now. 5,12,13 rt triangle, and subtract radius (4) from hypotenuse. oh well - i omitted no penalty</p>
<p>f(100) problem..every 7 was y=0, , so i put 2 because 7 goes into 100 14 times, with a remainder of 2, so you add 2 to 0 and get 2....</p>
<p>For the one where y=x for any real number the choices were x^2=y^2, x^3=y^3, |X|=|Y| and two others. I put x^3=y^3. Anyone else?</p>
<p>i have a question about that one. arent all 4 of them true and one wrong cauz if you the equation y=x true then all 4 are correct, minus D which is wrong mathematically</p>
<p>back to the f(100) problem, my thing only works if you start at where y=0...so i dont know if i am right..</p>
<p>i think the question was what answer choice is true that always makes x=y true.</p>
<p>I put letter E: x/y = y/x</p>
<p>for the flag question, did you all put that all flags may not have 2 colors or whatever..</p>
<p>I thought of it like this: they were looking for x=y before putting into the equations. So take two sets: x=2, y=-2 and x=2, y=2. Does 2^2= (-2)^2 Yes- but does -2=2 No. So the only one in which y must equal x if the equation is true is x^3=y^3,</p>
<p>I put that all flags may not have 2 colors.</p>
<p>All flags would have more than 2 is wrong since a flag could have 1 color only. And I forget the other possbility (which was false)</p>
<p>the flags question is a question called the contrapositive (A = B) then (- A = - B)</p>
<p>the y=x one
cant you have a set (2,2) and x^2 = y^2 , but your example proves that if it fails then it isnt equal which why i am saying if you hold y=x true then pretty much all four except D is true</p>