<p>is y = x symmetric about y = x or origin</p>
<p>std deviation was: 8, 10, 10, 10, 10, 12</p>
<p>i got 4 cs in a row in the beginning</p>
<p>prelewd: y = x</p>
<p>and, 4 Cs isn't possible, I believe. I believe ETS only does 3 in a row</p>
<p>I think I had a bunch of c's in the beginning, but not four in a row. I know I also got some e's in a row in the middle.</p>
<p>but y = x is also symmetric about the origin cuz f(x) = -f(x). its that question with where f(x) = inverse of f(x), and the only possiblity is y = x</p>
<p>yeah...that was the question when they are identical and inverses. I put the line y=x.</p>
<p>what was the period of the tan(2x) function?</p>
<p>2 lines can be drawn for x/(x^2 - 1)
.5 was probabilty for that probability question</p>
<p>wat was the answer for the area of the trapezoid problem</p>
<p>should have been pi/2, i think ... I think that I put pi >_<</p>
<p>period of the tan(2x) : pi/2</p>
<p>7.92 for the area of a trapezoid</p>
<p>I think the 8.13 (something alogn those lines) for the trapezoid. I used integrals to approximate it :)</p>
<p>for the trapezoid one, just graph the function given, and find the upper two points (it tells you the distance between them, and the graph is symmetrical about the y axis, so divide the distance by two and trace). use the y value as the height, and then use the formula for trapezoid area</p>
<p>for the trapezoid...its the average of the bases...which were 2.5 and 4, multiplied by the height. To find the height plug in 1.25 into the equation of the curve y=4-x^2</p>
<p>ask more questions that was on the test ppl, i want dun want my score to surprise me</p>
<p>prelewd, which probability question?</p>
<p>The over 100? That was .33</p>
<p>10 choices, 3 possibilities</p>
<hr>
<p>Trapezoid problem:</p>
<p>4-x^2</p>
<p>zeros: (+-2,0)</p>
<p>length at top = 2.25, so x = (1.25)</p>
<p>4- 1.25^2 = 2.4375 = height</p>
<p>area= 1/2(b1+b2)h = 1/2(2.25 + 4)2.4375 = 7.921875</p>
<p>i think i chose 2pi ..</p>
<p>im pretty sure the probability one was .5</p>
<p>periodicity of tan = pi, so dividing by 1/2 (multiplying by 2) makes 1/2 period, so pi/2</p>