<p>Good night shatender... haha CC makes me so worried about the SAT's afterwards... though I always end up just fine.</p>
<p>There was a limits one! I remember the answer being 2.</p>
<p>yea. u dont need BC for that. that was like calc 1 and precalc? >_>. just divide by the largest exponent in the demoniator ..</p>
<p>this sucks. right now i'm at 3 blank (sequence, dots, and given sinx=t what does tanx equal) and 3 wrong (the Rosa question cuz i forgot what a percentile was...haha, the 1/f(x) graph question, and the -cosx=sq.root(1-(sinx)^2)).</p>
<p>actually, i used calculus to find the minimum value of that function they gave us! :] it beat graphing and using the minimum function, especially since i still have yet to figure out how to properly manipulate graphs</p>
<p>The min was like something.7... I'm thinking 5.7 but I'm not sure.</p>
<p>-The plane and line one is two circles. I even drew a picture:
<a href="http://img371.imageshack.us/img371/4561/mathoi9.jpg%5B/url%5D">http://img371.imageshack.us/img371/4561/mathoi9.jpg</a></p>
<p>All points on either of the circles are 4 units away from the plane and 3 away from the line. If you don't understand the picture, its a line intersecting a plane perpendicularly with a circle on either side of the plane (parallel to plane). The line goes through the middle of the circles, and, if the circles were filled in, would intersect them perpendicularly. </p>
<p>-The heartbeat one is 60. Plugging in 60 in the function gets you nowhere. You had to understand that it said explicitly that one period = one heartbeat. In the function, it was sin(2pix + ___). The period of the function is then 2pi / 2pi = 1. So, one period is one second. Then you can reach the conclusion that since a period = a heartbeat, one heartbeat = one second. It asks for the number of heartbeats in 60 seconds, which is obviously 60.</p>
<p>Did you get 5.7 for the minimum or is that just me making up numbers?</p>
<p>Yes, the min was 5.7 and it occured somewhere between 0 and 1 (I just used the minimum function on my calc).</p>
<p>Hahaha I used the table and set the scale to .1 so that it was like 5.7 for the lowest number I could see.</p>
<p>Minimum was 5.7 (I think I got it by substituting .75 for x in the equation)</p>
<p>There seemed to be a really easy one but I'm scared it actually wasn't that straightforward : the radio station charges the record company $75 to play their song, and 15 cents every time (n) to play their song. The songwriter gets 20% of what the company pays the station?? </p>
<p>is the salary just
(75 x 0.15n)0.2</p>
<p>answer A??</p>
<p>it was 0.2(75 + 0.15n)</p>
<p>Wait, is the curve preset? or is it actually determined by the scores, because I was under the belief that it was preset.</p>
<p>the curve is preset but in a general manner. if a test is somewhat easier (which they determine based on students' performances) then the curve is less generous by one or two questions. if it is harder then there is a one or two question leeway. for example, on an easy test, a raw score of 44 is the cutoff for a perfect score while on a hard test, a 42 is the cutoff.</p>
<p>Wait? you say it's preset, but determined by student performance? How does that work?</p>
<p>Does anyone remember the exact wording of the Plane + perpendicular line?</p>
<p>I recall it to be, a line intersects a plane perpendicularly... and then my memory fails.</p>
<p>(I didn't make this) This is what it should look like.</p>
<p>dtl42, when i say that it is preset, i mean that they have a preset range for scores. for example, 42-44 is the raw score range for the perfect score cutoff. but which number is the actual cutoff is not known until student performance is considered.</p>
<p>for the qtion: sinx=t, what is tanx?
does anyone remember if there was an answer like 1/sqrt(1-t^2)? </p>
<p>im scared i might have put that instead of t/sqrt(1-t^2)</p>