March 12 SAT Compilation of verified answers - Math

<p>Since a few hours have passed, let's start to compile the answers that have -hopefully- been thoroughly discussed and verified. This thread is for the math sections.</p>

<p>As usual, let's keep the general discussions out of this thread.</p>

<p>Section 1 was the Essay section and the prompt pertained to why or why not majority rule is always right.</p>

<p>On my test the essay was about whether or not creativity is necessary in today's society (or something along those lines)</p>

<p>The one with the 2 circles in the big circle was 12 pi because radius of big circle=6 and radius of each smaller one was 3. One of the smaller ones was shaded and all of the top half of the big circle minus the unshaded small circle was shaded, like a yin-yang symbol. Answer= 12 pi.</p>

<p>The squirrel question (grid-in) was 200.
Another grid-in that asked to solve (basically) Sqrt(x) = x / 40, x = 1600</p>

<p>Can anyoen get this going, based on the other thread? Thanks.</p>

<p>My answers:</p>

<p>200 (squirrels)
75 (two similar triangles, perimeter)
.2 (some absolute value problem...I think it was any number between 0 and 1/2?)
graph going through origin (directly proportional question)
1600 (sqrt being equal to number divided by 40)
$27,200 (chairs + tables)
2 (hypotenuse of triangle w/ perpendicular line drawn through it)
12pi (yinyang circumference)
2.5 ( (x-y)^2+(x+y)^2 > 25 or something like that)
24 (right angles of a cube)
3/8 (unshaded rectangle)</p>

<p>Please don't tell me they asked for the unshaded region in that rectangle problem... Being accustomed to being prompted for the area of the shaded region, I automatically calculated that and came up with 5/8.</p>

<p>What I recall...</p>

<p>X^2<X^3<X for the inequality that does not work for any number X</p>

<p>That's the one that had me going for a while.... stupid numbers with an absolute value less than 1 :P</p>

<p>i coulda sworn they asked for shaded, i put 5/8</p>

<p>They asked for shaded. 5/8.</p>

<p>Wait...yeah. I think I put 5/8. :P</p>

<p>someone explain the 2 problem..the hypotenuse one</p>

<p>the hypotenuse of the triangle is 3, so the other lengths must be less than 3. 2 was the only choice that was less than 3</p>

<p>the hypotenuse was 3, so the legs have to be shorter. 2 was the only choice that was less than 3.</p>

<p>the phone charge question- I got (555-x+y) / y. can anyone verify?</p>

<p>Triangle ABC. Picture it in your head.</p>

<p>AC=6
BC=3</p>

<p>P is a point on AB such that CP is perpendicular to AB. That leaves you with two right triangles: CPB and CPA (Yay accountants :))</p>

<p>Since BC is only 3, and it is the hypotenuse of CPB, CP MUST be less than 3. The only choice that conforms with said rule is 2, A.</p>

<p>Affirmative Mirage, that would be it. Divide through to get 555-x/y +1, which is what you needed, the one out there to compensate for the minute knocked off by x.</p>

<p>People keep positng the Write-ins </p>

<p>and the same ?'s...we all know answers to these</p>

<p>anybody remember any other ?'s so we can diversify the answers</p>

<p>Question with the graph of water and pail, 1/3</p>