Official December 10th ACT Math Discussion

Test Preparation ACT Preparation
81

<p>Why would you round down to 13 for the paint question?</p>

<p>If you multiply 6.6 by 2, it’s 13.2. If you only had 13 cans, you would not be able to paint everything. It is the minimum amount of cans needed to finish painting.</p>

82

<p>I said (5,9,13) too. Can somebody else confirm this?
Also, for the one with the sinusoidal function where you had to find like the period and amplitude, was it 3 and pi?</p>

83

<p>does anyone know when scores come out? (like an estimate)</p>

84

<p>period pi and amplitude 3?</p>

85

<p>^ oh, I want to know that one to. If I got that one right, I should have a 36</p>

86

<p>What were LETTERS for log prOblwm and Gardner?</p>

87

<p>It was amplitude 3 and period pie</p>

88

<p>amp 3 period pi</p>

<p>can anyone else confirm the obtuse triangle thing?</p>

89

<p>It was the 6,9,13 triangle for the obtuse question.</p>

90

<p>Was the answer to the two thirds/geometric one choice C or D?</p>

91

<p>Proof for the obtuse triangle: <a href=“http://s10.postimage.org/sy5avf0jb/Screen_Shot_2011_12_10_at_3_35_23_PM.png[/url]”>http://s10.postimage.org/sy5avf0jb/Screen_Shot_2011_12_10_at_3_35_23_PM.png&lt;/a&gt;&lt;/p&gt;

92

<p>If CC had a like button, I would like that</p>

<p>edit: Wait, wasn’t it (6,9,13) and not (5,9,13)?</p>

<p>edit2: Regardless, if a^2 + b^2 < c^2, then it is obtuse-angled. (6,9,13) and (5,9,13) both suit this situation.</p>

93

<p>My bad… I just made it for what they said. It would still be essentially the same though.</p>

94

<p>It was C. 10char</p>

95

<p>Obtuse triangle: 6, 9, 13
x=0 and x=7/3
135th number: 8
Ratio of ball dropping: Geometric 2/3
Highest median: 90
tan-1(3/25)
Hour hand: 21 degrees
Garden: 6 by 24
Which cannot be X-value: 1
Equal volumes
Gallons of gas: 9.4
Buckets of paint: 14
Keisha’s weight: |w-p|<=5
Copy machines: slope, smaller slope, slope
Circle probability: 1/9
Amplitude and period: 3 and pi
Other point on circle: (8, -3)
Isosceles triangle: sqrt(200)
(x^a)(y^a) = (xy)^a
16(.2) = $3.20
Law of sines: 80 sin 110 / sin 24
0.0000376 = 376 * 10^-7
Infinitely many solutions: 9
Arc length: 8pi
log(x) + log(x-2) = log(x^2-2x)</p>

<p>(from the 2010 thread)</p>

96

<p>Wasn’t the highest median 80? D:</p>

97

<p>@starchywinky: which one are you referring to for choice C?</p>

<p>And the highest median was 90, I believe.</p>

98

<p>can we go over the logic question?</p>

99

<p>C for the geometric one.
And damn…I think I counted 7 instead of 8. Oh well that’s one wrong.</p>

100

<p>I believe the copy machines was the straight line… it said both copied at the same rate…</p>