Math Level II December 3, 2011 Curve/Discussion

<ol>
<li>D = RT Question: 53 and 1/3</li>
<li>Question #50 (f(a/4)): .92</li>
<li>Negative Integer with the 42 thing: -6</li>
<li>Four digit number with 23 together: 6 ways</li>
<li>Period of sin + cos function: 2</li>
<li>something times x^2 plus something times y^2 was equivalent to some expression ended up yielding a = 2 and b equal to 4/sqrt(3)</li>
<li>Option E for which polynomial has three zeros</li>
<li>Limit of a function (x+2)/(x-2). I actually can’t remember the answer for this one. Some1 help me out on this.</li>
<li>f(x) = r^x. f(something) = something else. What is f(7). Can’t remember answer</li>
<li>First question: f(x) = x^-1.5. What is (f(something))</li>
<li>Arithmetic sequence: started at 1, kept on adding 7, answer was something like 92?</li>
<li>Polar function question: (3π/2, 2) was the answer (question was which is not a point on the graph)</li>
<li>logn/log2 about something being less than and greater than at same time or something. answer was 19</li>
<li>if 3costhetha + 3sinthetha = 1, then which is true? x^2 + y^2 = 9</li>
<li>Median w/h in the table was .248</li>
<li>Predicted height based on w/h = 192 </li>
<li>Standard deviation question was the single bar answer (I think it was A and the bar was at 80)</li>
<li>perfect cube question p^2r^5t^7 or something like that where p, r, and t are all distinct primes. dunno answer</li>
<li>The plane answer where m is a plane and C or something is a point 6 away from the plane and what is the portion of the plane that is not 12 away from it or something.</li>
<li>What are the coordinates of the point U of the function of f(x) = sin(x) + 1. It was π/2, 2 I think.</li>
<li>How many years will it take for population to go over 6million. Everyone says four or three but I could have sworn it was 5 (option E). Maybe i made a stupid mistake.</li>
<li>How many times does the graph of the equation cross the x-axis?
I don’t remember the equation but it goes something like this: xy^5-3y=2x^2+xy dunno the answer</li>
<li>f(x) = 1/(x^2+2) For which value of x is f(x) closest to 0.01. That one has two correct answers! Both 9 and 10 give pretty much the same answer.</li>
<li>There was one with three tables of x and y values asking which one(s) is(are) a function. They basically asked whether you can have multiple values of x for a single value of y, or the reverse.</li>
</ol>

<ol>
<li>was definitely 10 </li>
<li>53 1/3 its a repeat of 1. you can get rid of it.</li>
</ol>

<p>what about the y^5 equation? How the heck do you graph that??</p>

<h1>17 was</h1>

<p>If p, q, and r are distinct prime numbers, what is the smallest perfect cube that is divisible by p^2<em>q^5</em>r^7?</p>

<p>answer: p^3<em>q^6</em>r^9, (choice B?)</p>

<p>wouldn’t it be choice C pqr all to the 9th. I dont know i just plugged in 2, 3, and 5 and tried it out for the different answer choices.</p>

<p>if 5 omitted and 1 wrong… is there a chance for 800 ?</p>

<p>-a chance if everything else is right. I have the same scenario on my hands. 5 omitted 1 wrong. Still I’m sure I made dumb mistakes. I just want above a 720</p>

<p>Should i cancel? Everyone here said it was super easy…but I skipped like 7 :/</p>

<p>CyberNareN12:</p>

<p>It asked for the smallest perfect cube.
p^3<em>q^6</em>r^9 is a perfect cube because p^3<em>q^6</em>r^9 =(p<em>q^2</em>r^3)^3
and it’s divisible by p^2<em>q^5</em>r^7 because (p^3<em>q^6</em>r^9)/(p^2<em>q^5</em>r^7)=p<em>q</em>r^2</p>

<p>p^9<em>q^9</em>r^9 is a perfect cube and it’s divisible by p^2<em>q^5</em>r^7, but it’s not the smallest such number</p>

<p>Was the answer with 20km, going 40 and 80 for 10 each, 60?</p>

<p>It was one of the last problems … and was so freaking easy, I thought it was a trick …</p>

<p>yeah it was 53.333 because you have to account for the fact that when hes going 40km for 10 km hes going for .25 hours but at 80 km for 10 km hes only going for .125 hours. </p>

<p>@Hiking7610 #17 okay i see what you did, makes sense. dang, i missed at least one :/</p>

<p>^difference between the number and it’s squared, meaning n and n^2.</p>

<p>For -7, that’d be 49-(-7)
For -6, it’d be 36-(-6) which is 42. Think of a number line if that helps you visualize</p>

<p>What is the negative integer that is 42 less than the square of the integer?</p>

<p>x^2 = x+42</p>

<p>x^2 - x - 42 = 0 </p>

<p>(x+6)(x-7) = 0</p>

<p>x = -6 or 7 but x has to be - so x = -6.</p>

<p>Ah **** …</p>

<p>what was the letter answer to the last problem?</p>

<p>What was the one where you shift the circle (x-3)^2+(y-1)^2=36 (numbers are probably off) by 5 units right and 1 unit down? (or something along those lines)</p>

<p>GoSulk
Earlier, people said the answer was 53 1/3</p>

<p>what was the letter answer to the last problem?</p>

<p>Question #50 (f(a/4)): .92</p>

<p>thanks!</p>

<p>I think the curve will be really harsh, in my opinion the first 25 were freebies …</p>

<p>It was 53 1/3,</p>

<p>When will the scores be out?</p>