June 2010: Math II

<p>ohhh, I thought you meant those were the answers lol</p>

<p>f(x) = f(x-2) + 3</p>

<p>anyone remember this one.</p>

<p>Consolidated Answers:
f(3) - f(1) = 6
Segment with five distinct points: 10
Last problem (disk/laser): B) 987
Complex number: 2-3i is also a root
Given x=√(2+√2), find (x^2-2)^2: 2
Angle with slopes of line l and m (2/5 and 3/5): 9.16 degrees
Parametric: -1/3
Infinite series: 2 - (1/n)
f(t)=2cost and g(t)=sin(t/2), find the slope of the line connecting (0, f(0)) and (pi, g(pi)): -1/pi
Value of x^x as x approaches 0: 1
Domain, range: {1, 2, 3}
ln x = e^-x: 0.27
Average speed of car: less than 50 mph
Graph shift, f(x) = f(x-2) + 3: two to the right, three up
Graph of f(x) = 1/g(x): 3
(a^3)^2=123.1: 2.2
Extending line segment, with ratio 1:2: (8, 12)
Perimeter of equilateral triangle: 15
Unit circle/chord: 2sin(theta)
Perimeter of triangle on a cube with side length 7: 26.8
Inverse graph: D)
Absolute value: b
Volume of cone: 18.88
Logic (if…, then…) t >= 3
Period: sin(2pi)
Average scores/min. number of judges: 5
1.5 radians -> degrees: 85.9
5^(2x+1) = 96: take log of both sides and solve => 0.918
Point symmetry: I and III (about origin; across y=-x)
n(n+1)(n+2): divisible by 2 and 3, but not 4</p>

<p>I think that’s everything. o.o</p>

<p>for the disc question, i clearly remember them saying from the edge of the disc. why else would they give you a radius? and a later can penetrate a disc, it doesnt necessary have to be at the center.</p>

<p>does anyone remember the question were 0>y>4 and y=5??? that made no sense</p>

<p>i know it’s ridiculous to ask, but was the parametric one “D?” i can’t remember if i circled 1/3 or -1/3… or does someone remember sort of what the question was?</p>

<p>@basketball,</p>

<p>its not ridiculous, we’re all freaks here. unfortunately i can vividly -1/3 being (B) sorry :(</p>

<p>PS</p>

<p>Does anyone remember the actual question for the absolute value problem?</p>

<p>For the one with the judges, did it ask for the minimum number of judges or the minimum possible score?</p>

<p>@miamirulz29 it was min, why would they ask for the max?</p>

<p>

</p>

<p>Work backwards than.</p>

<p>Arctan (987ft/1188000ft (which is at the bottom of the disk))=0.048 degrees</p>

<p>Arctan (1037ft/1188000ft)=0.05 degrees, which is the correct angle that he missed by. by subtracting 50 ft, you are changing the angle that the problem states he missed by.</p>

<p>I didn’t ask if they asked for max. I asked if they wanted the min. score a judge could give a person. If it is min. judges, then I got that wrong because I misread it.</p>

<p>Minimum number of judges.</p>

<p>For the triangle in a cube, I got that each diagonal was 7*sqrt (2). I added 3 of those together. Is that 26.8?</p>

<p>No, they wouldn’t give you 6 and 5.4 if they could score anywhere from 1 to 10 and you didn’t know how many judges there were.</p>

<p>It was minimum number of judges.</p>

<p>@basketball, ohlawd
I remember -1/3 being further down the list…around D. Or was that -1/pi? bleh.</p>

<p>@runnerxoxo
I remember that problem, too. But I realized that it made sense. For some reason.</p>

<p>Some stuff I noticed on the consolidated list…</p>

<p>(x^2)^3 = 2.2</p>

<p>Isn’t this 2.23? 2.2^6 doesn’t equal 123.1. For the perimeter of a triangle in a cube with edge 7, the answer is 29.1 something. Each side is 7sqrt(2).</p>

<p>We’re missing ~20 questions. I remember one where it asked for the product of the slopes of two perpendicular lines, which was -1.</p>

<p>RocknPiano, it asked for the distance from the edge, not the center. Yes, .05 degrees from the center is 1037 feet, but the distance from the edge was only 987 feet.</p>

<p>Luminouzz, it was 2.23 but the answers were rounded to tenths.</p>

<p>“Arctan (1037ft/1188000ft)=0.05 degrees, which is the correct angle that he missed by. by subtracting 50 ft, you are changing the angle that the problem states he missed by.”</p>

<p>Yes it is the correct angle, but now the 1037 is the distance you without subtracting the 50</p>

<p>@mia woops sorry, yeah i actually misread to problem at first too</p>

<p>What about the one where you had to use the law of sines?</p>

<p>Someone mentioned it earlier, but I think they had it backwards.</p>

<p>Wasn’t the 30 degree angle paired up with the length 10 side? So I think the answer was bigger than that, something like 15.</p>

<p>Crap I got that one wrong. I knew the min. number of judges were five, but I thought it asked for something else. I think -1/3 was either B or D. Also, 314159265, I did the samething you did, but I didn’t get that answer because 7 * (sqrt 2) and multiplied that by three and got 29.69.</p>

<p>does anyone know when the scores come out?</p>

<p>there were two different questions.</p>

<p>Inscribed triangle in cube was: 3<em>(7sqrt(2)) = 28.69 ish
Two coordinates of equilateral: 5</em>3 = 15</p>