<p>wasnt it just greater than 3 not greater than or egual to?</p>
<p>Yes, average speed has to be less than 50. The distance traveled is the same, the time traveled differs, and since you are driving slower at 40 than at 60, you spend a bit more time driving at 40. Therefore, the average speed is closer to 40 than it is to 60.</p>
<p>the average speed was less then 50… i thought this one was a little tricky</p>
<p>no, it was greater than AND equal to. Contrapositive means you reverse everything, and because it was just simply less than in the first statement, it has to be greater than AND equal</p>
<p>Yeah, the average speed had to be less than 50.<br>
And I thought the laser question asked how far it would miss the center, not the edge. Oh well, there goes my 800.</p>
<p>For that harmonic-esque series thing that was like:</p>
<p>1 + (1 - 1/2) + (1/2 - 1/3) + (1/3 - 1/4) + … + (1/(n - 1) - 1/n)</p>
<p>The final answer was 2 - 1/n, no?</p>
<p>i learnt how to do that average speed one from my history teacher who said he would give anybody extra credit who got it right and no one did so i knew how to do that question thanks to him.</p>
<p>and yeah 2-1/2 was right just plugged in numbers</p>
<p>wait why was it less than 50?</p>
<p>Yeah Keasbey, that’s what I got. I plugged in numbers to confirm.</p>
<p>2,2 and -2,-2 symmetric about y=-x and the origin?</p>
<p>broncos</p>
<p>tan(.05) = opposite/adjacent = x/(225*5280)
x = 1037
1037 - 50 = 987</p>
<p>What was the answer to the absolute value expression with b and a?</p>
<p>And the series with 1 + (1-1/2) + (1/2-1/3), etc?</p>
<p>^ got the same thing</p>
<p>The answer to the absolute value problem was “b”. I confirmed it with numbers.</p>
<p>@sententia</p>
<p>i got -2 for the b & a</p>
<p>Buster, the average speed question can be solved with “(d+d)/[(d/r1)+(d/r2)]”
d being the distance, and r being the rates. If you plugged in a number for d, you would find that the average rate is less 50mph.</p>
<p>did anybody else get 2 for when g(x) =0</p>
<p>what was the absolute value question? just a small reminder…</p>
<p>Keasbey, I got b also. But I only tried a couple different sets of numbers, so I was a little worried.</p>
<p>What was lnx = e^-x?</p>
<p>i got i think .57 or something for that lnx one. it worked on the calculator</p>
<p>the absolute value one was b (answer choice d i think).</p>
<p>i almost missed that because i plugged in -1 for b and the answer came out to -1 so i almost just put that for the answer but then i remembered i should probably check another number.</p>
<p>987, less than 50, b, 2-1/n, and 3 for the g(x) one</p>
<p>lnx = e ^-x i got .27</p>