<p>and i dont think there was a dice question anymore.</p>
<p>What are you talking about, mean temp of 2. Do you mean 2 temps within 3 of the mean for the noon temperature question??</p>
<p>2 is the correct answer.</p>
<p>How do you guys do number 48 or 47 ( the one with the alcohol percent). I am so dumb. 50 said .3 percent but I plug ratio = .3. That was why I kept getting wrong answer. So I skipped it. Disappointed!!</p>
<p>@sat i know. 2 temps within mean temp. i was just writing shorthand which is not very helpful. sorry.</p>
<p>Ok I’m still not convinced with the lake depth being 8.6. wasn’t the amplitude 2?</p>
<p>it might have been. i think everyone forgets. i just know whatever it was i multiplied by two.</p>
<p>It was definitely 8.4/8.6. I specifically checked for this. It asked for the difference between the maximum and minimum water depth.</p>
<p>Ok did anyone else think this was harder than the bluebook practice exams for math ii and run out of time? I left like 10 blank due to sheer time issues and other kids I knew who were brighter than me left fewer blank but also said they ran out of time :/</p>
<p>@dragon you have a system of equations.</p>
<p>.7x + .2y = 350(half of solution)</p>
<p>x + y = 700(entire solution)</p>
<p>Ok 4.3+2cosx gets a difference of 4-ish but 2+4.3cosx gets a difference of 8.6 x_x DID I PLUG IT INTO MY CALCULATOR INCORRECTLY</p>
<p>Harrovian, so the amp was 4.2-3.</p>
<p>if you guys graphed it you would easily see its not 8.6…</p>
<p>loveforsat your method is your issue. the max of cos is 1. min of cos is -1. so they both have the same amplitude which is the coefficient of cos x: 4.3. the difference of amplitudes is 4.3 * 2. it is 8.6 or 8.4(depending on 4.3 or 4.2)</p>
<p>felson, we are talking about difference of depths. the only thing that matters is the amplitude which is 4.3.
4.3 * 1 = 4.3
4.3 * -1 = -4.3
difference:8.6</p>
<p>@daniel. I didn’t have to graph it. My calculator solves both Range and Amplitude for me. The question asked for ther ange, and it was obviously 8.4/6. </p>
<p>And @Full. I actually thought it was a lot easier than BB test #2 and about the same if not a little easier than #1. There were a few questions I had trouble with in #2 but today there was no problem at all finishing. I finished just after the proctor called 30 minutes.</p>
<p>But if it was 4.3 + 2cosx, the difference in amplitudes would be 4 not 8.6. So i think I might’ve switched the amplitude with the vertical shift.</p>
<p>oh maybe you guys are right. whatever i still probably got 780-800</p>
<p>I agree with HBOUND, and I am pretty sure (200%) that it was 8.6 ( 4.3 is amplitude, but the difference is 4.3+4.3 = 8.6)</p>
<p>-6 800 is the safe prediction for the curve. anyway. we touched on around 42 questions. pretty good guys. we can still get more.</p>
<p>I think -5 800 is more probable.</p>