Official Act Math Thread February 2013

<p>It was towards the end, algebra based, paragraph type question. It may not have been asking about price but I remember two of the answers were 850 and 2000 and something. I wanted to do the geometry questions first (weird i know) so I skipped it and came back. Time was called and I circled 850…</p>

<p>We should probably try to repeat the questions, so other students can agree/ disagree.</p>

<p>Thanks Kongo</p>

<p>Also square root of 13 for the radius question anybody?</p>

<p>Was 24n C? And wasn’t the period 3pi? I drew it with my pencil and you only needed 3pi to draw the whole graph</p>

<p>^I got that too gleek96!</p>

<p>Pencils Question: School buys 5 pencils for $.90. School sells 3 pencils for $.80. How many pencils have to be sold for a $100 profit?</p>

<p>Someone make a science thread!</p>

<p>For the pencil one, I just could not get the right answer. Could someone look over my work and tell me where I went wrong? School buys 5 pencils for 0.90$, sells 3 for 0.80$. .80/3 - .90/5 = profit. Then I divided that 100 by that.</p>

<p>Diddly, the period was 4 pie { according to most of the students on the site and myself }</p>

<p>Was the radius 5? Points were (3,-1) and (6,3) I believe.</p>

<p>Was 24n C? Anyone???</p>

<p>For the trig one at the end about law of sines, what did you all get?</p>

<p>The radius one was 5, it used Pythagorean Theorem.</p>

<p>Diddly, I believe 24n was c!</p>

<p>The circle radius sphere problem wasn’t rt13, it was 2rt3</p>

<p>YAY I GUESSED C BECAUSE I HAD ABSOLUTELY NO IDEA. YAY FOR RIGHT GUESSES!!! lololol</p>

<p>Kongo, were those the end points… i forgot. If those points were the midpoint and an endpoint, then you are right</p>

<p>SinQ/PR = Sin25/QR</p>

<p>Idk what PR and QR are</p>

<p>@mereluvs2run 'twas 4 pi. look up teh definition of a period.</p>

<p>@mereluvs2run
The answer was definitely 4pi, its from one crest to another</p>