**Official June 2013 SAT II Math 2 Thread**

Test Preparation SAT Subject Test Preparation
101

<p>it was:
150—>3
x----> 12</p>

<p>do the squares and inverse propotion, gives you x= 9.375</p>

102

<p>here are the answers i got, if anyone else copied them, can we compare? </p>

<p>1-5. c e b c c
6-10. a c d a b
11-15. c a e b b
16-20. d a c a c
21-25. a e e e b
26-30. e d e d d
31-35. c b e d a
36-40. b a d e b
41-45. c (guess) d c d a
46-50. d d b e (guess) e</p>

103

<p>pretty sure it’s 0. the coefficients can be 0, because they only asked for rational coefficients (IIRC, might be wrong).</p>

<p>In that case, you’d be left with a graph of y = a number, which won’t touch the x axis unless it’s y = 0</p>

104

<p>@ mystic
that’s what i did to. im pretty sure that is right, since if a-bi is a root a+bi must be too</p>

105

<p>for the increasing x value, i remember the choices were
I. (1/2)^x
II. 2^x
III. some linear equation that looks something like 4x+ 1
Because the first one decreases as x gets bigger and while the other 2 increeases as x increases, so i put II and III as my answer.</p>

106

<p>Wait yeah, thinking back on it the format of the equation is Ax^5 +Bx^4… +K. But let’s say all the coefficients of the equation are 0 except for B which is 1 and K>0. That would lead to 0 real roots, right?</p>

<p>Maybe I’m overthinking this.</p>

107

<p>Combinations of pizza toppings? 92?</p>

108

<p>Yup Also got 92 @medicalboy</p>

109

<p>yes, that would lead to 0 real roots.</p>

<p>@medicalboy</p>

<p>yeah i got 92 too.</p>

<p>also the cone thing was 3.2 or whatever.</p>

110

<p>Can someone explain the 9.375 please? Sorry I’m just slow.</p>

111

<p>I got 2 for the cone one… Do we assume that the radius for the similar cone is also 2??</p>

112

<p>Unless I misread the question, you can’t assume the radius is just 2 because if the cones need to be similar, height to radius ratio must stay 2 to 1. Pretty confident that the answer is 3.2</p>

<p>Anyone for the answer to the three functions, asking which ones increased with x?</p>

113

<p>I got 3.2 as well. You can deduce that the height of the cone is 2r because the ratio has to stay the same as r, so you get the formula (1/3)(pi)(r^2)(2r)=8.3 or whatever half of the original cone was. After solving for r (about 1.6), you multiply by 2 to get 3.2.</p>

114

<p>Oh darn… So 1 wrong and 2 skip… Would I still be able to get an 800?..</p>

115

<p>That’s still a score of 47, as long as you don’t get anything else wrong that should be an 800.</p>

116

<p>@DR14AHS Since the question said the pizza could have 1, 2, OR 3 toppings, you do 8nCr3+8nCr2+8nCr1=92.</p>

117

<p>@fakeperson123</p>

<p>no, why would we do that?</p>

<p>Here’s my work: <a href=“http://i.imgur.com/3ZlXvaQ.jpg?1[/url]”>http://i.imgur.com/3ZlXvaQ.jpg?1&lt;/a&gt;&lt;/p&gt;

118

<p>the cliff problem was a little difficult but I got 41 and believe that is the right answer.</p>

<p>this is how i solved it: <a href=“http://s15.postimg.org/uzn06vbuj/ANSWER.png[/url]”>http://s15.postimg.org/uzn06vbuj/ANSWER.png&lt;/a&gt;&lt;/p&gt;

119

<p>what was the one with the equation with temperature and the number of ice cubes you put into a cup? they asked what the least number of ice cubes was to bring the temperature to 32. </p>

<p>it was 25 right</p>

120

<p>I think the cliff is 41 too can someone show the work for the inverse question also when do we get results btw for the number of zeros question it’s 1 if all coefficients are zero y=0 so their are infinite roots. I got lucky with that question</p>