Nov. '09 - SAT Math Level 2

Test Preparation SAT Subject Test Preparation
81

<p>I put 3.7 for the question with f(4.7)</p>

<p>1 omit 3 wrong :(</p>

82

<p>It was definitely 0.7 for the piecewise. Because f(4.7)=f(3.7)=f(2.7)=f(1.7)=f(0.7)=0.7</p>

83

<p>the 3.14 was the tangent question with a radius of one and a 30 60 90 triangle on the left.</p>

84

<p>i hope 44 is still a 800.</p>

85

<p>Ah I get it now. Forgot the -1 is not part of the actual function and only affects the x-coordinate… Darn.</p>

86

<p>doesnt x=3 make a line in (x,y,z)?</p>

87

<p>no it’s a plane.</p>

<p>just think, z=0. Does that make a line? No, it makes the xy plane we’re so familiar with.</p>

88

<p>yeah, wouldnt x+y = 3 be a plane along the z axis and so forth?</p>

89

<p>-nevermind- lol. Got it now.</p>

90

<p>nevermind
10char</p>

91

<p>answers: (random)

  • theta + alpha cannot be 150
  • above 99 percentile for the last question
  • infinite # of triangles for no. 49
  • sec theta for the one that asked for largest value
  • Ellipse center= (-2,5)
  • polar questio= (.5. pi/3)
  • x-intercept k<=0
  • 3.14 (can’t remember the question. lol.)</p>

<p>Add on to the list.</p>

92

<p>yep percentile is 99+ because (84-74)/2 = 5 standard deviations away.</p>

<p>according to the 68-95-99.7 rule a score just 3 standard deviations away is in the 99.7th percentile in a normal distribution.</p>

93

<p>r u sure there’s infinite triangles for 49? isn’t it 0… (i put 2, but anyway…)</p>

94

<p>actually, it is a plane (try graphing in 3d)</p>

95

<p>lol everyone remembers the 3.14 answer because it resembles pi… But no one actually remembers the question! I’m just glad I put 3.14 as the answer!!</p>

96

<p>also…
r = costheta
x = rcostheta
r = x/costheta = costheta
x = cos^2theta</p>

<p>so… wasn’ it like (1, pi)? >.<</p>

<p>edit: bleh nvm, got it wrong</p>

<p>the 3.14 question was a circle and it had a tangent line or something :P</p>

97

<p>what about the one where you had to graph x=4 on the 3D plane… it was just a line right?</p>

98

<p>again.</p>

<p>x=4 is a PLANE</p>

99

<p>I put plane.</p>

100

<p>how many can you skip to ensure a 700? looked in the collegeboard book and i know it’s 35/50 but i’m wondering if it might be more/less lenient</p>