<p>the avg speed question was 53 1/3 spirited~</p>
<p>It is 53 1/3.</p>
<p>Average speed = total displacement / total time</p>
<p>Total displacement = 20
Total time = (10/40) + (10/80) = 0.375</p>
<p>Average speed = 20/0.375 = 53 1/3</p>
<p>CRAP i picked 60, and i'm in physics too... Now i have 4 missed... hope i can still hit 800.</p>
<p>wait, what was the limit approaching answer again, 3.67 right</p>
<p>What numbers were some of these question??????...i am freaking out because I don't remember having to use law of cosines or do the average speed problem...but i didn't complete the whole test either</p>
<p>well, i'm not sure if the law of cosines was necessary but hopefully you managed to get the right answer</p>
<p>the law of cosines problems was a triangle with sides 4, 5, and 7. And they wanted the angle whose opposite side was 7, so it was the largest angle....but I couldnt remember the law of cosines so i skipped!</p>
<p>yea i thinkt the limit one was 3.67</p>
<p>Hey,</p>
<p>I know this was a pathetically easy SAT-I-Math-esque question, but I just wanna make sure I didn't over-simplify the problem.</p>
<p>For the red, blue, and green marble problem, what were the odds of pulling them out in a certain order? 1/3 x 1/2 = 1/6?</p>
<p>I'm pathetic if I got that wrong.</p>
<p>brinestorm -- you're good</p>
<p>Did anyone get the one with the point 6 inches from plane P, and it asked for the area of the plane when 12 inches away or whatever? (didn't know what it was asking so i skipped it).</p>
<p>I got (D) for number 50 as well.</p>
<p>ok farnworth, the answer I think was 113 or 339. don't remmber what i put.</p>
<p>sbi, how did you come up with the answer? did you find the area of a circle, with the radius being one of the legs of a triangle formed from the length of the line, and 6 (if that makes any sense)?</p>
<p>Keep up the sarcasm and it will* get sanguine in here, chief. ;)</p>
<p>The one with the point 6 inches away was 339. You think of it like a triangle, with one leg 6 and the hypotenuse as 12. Find the other leg. it = root of 108. That is the radius of the circle on the plane. To find the area use A = pi*r^2 and it comes out to be 39.</p>
<p>Haha, mr_sanguine, disregard my last post. I thought you were busting my balls, but now that I read it again, I guess you were just saying that I was safe with my answer. ;)</p>
<p>Why is the marble one 1/6?</p>
<p>You start with 3 choices, right?
They want red first, so the probability of choosing that is 1/3.
Next the want blue and after the red, the prob of blue is 1/3.
And after the blue they want green so the prob of green after blue is 1/3.</p>
<p>So 1/3 x 1/3 x 1/3 = 1/27</p>
<p>Comments? Suggestions?</p>
<p>lol no problem (this isn't sarcasm, just to make it clear :) :))</p>
<p>there are only six possibilities. rbg, rgb, grb, gbr, brg,and bgr so it is 1 out of 6</p>
<p>for the marble problem, you don't replace them after you draw them. it's 1/3, and then there's only two left so its 1/2 and then there's only 1 left.</p>