<p>oh god-- i still cant figure it out</p>
<p>the radius points are (-4,3) and (5,0). that slope comes out to be -1/3. neg reciprocal is three??</p>
<p>Yep, I think I got 10 or something like that for that one… I could probably check my calculator and hit 2nd entry a few times haha.</p>
<p>The tangent line easy if you use calculus…
But if not, then it would be pretty hard</p>
<p>not really…you just find the slope of the radius and then neg reciprocal that…but i obviously got that wrong— but can someone find the error?</p>
<p>the radius points are (-4,3) and (5,0). that slope comes out to be -1/3. neg reciprocal is three??
Huh? The slope of THAT line begins at the origin through -4,3.....</p>
<p>So the simply slope is simply -3/4... The tangent/perpindicular is negative inverse.</p><p>Hmm, man if i subtracted wrong or something… Do you rmr if 32 was even an answer?</p>
<p>Van sant, the second point (5, 0) is a point on the circle, not the line.</p>
<p>You cannot use two point to determine the slope of line l, simply because you are not given a second point for the line.</p>
<p>Instead, you must note that the tangent line must be perpendicular to the slope of the radius.</p>
<p>Because the circle is centered at the origin, we can use the points (-4, 3) and (0, 0) (two points on the circle, not on the line) to determine that the slope of the radius is -3/4.</p>
<p>Therefore the tangent (which is perpendicular to the radius where m = -3/4) is -1/m, or 4/3.</p>
<p>EDIT: Unfortunately the preceding book question ate up all my time so I couldn’t grid this one in. I ended up thinking about it the entire test and contemplated whether I should go back and put in my answer. I ended up not doing that, felt it was a bit dishonest.</p>
<p>hmm. i used (5,0) for some inexplicable reason.</p>
<p>i got 10 too not 32</p>
<p>ah jeez. thanks for that! phew, im glad thats the only one so far. any ideas as to the curve?</p>
<p>I subtracted everything. Maybe i did get 10.</p>
<p>I put 1.25 for the tangent slope, other than that it appears I got them all.</p>
<p>How is “one blank” (missed grid-in) looking for this sitting? 780? 790? 770?</p>
<p>And I found CR and W pretty nice too! <em>Crosses fingers for 2300+</em></p>
<p>I’m a senior, so this was my last shot…</p>
<p>for the television shows?? for some reason 22 sticks out really clearly in my head</p>
<p>hey for that decimal (1) (3) (find last digit question)</p>
<p>I think I put the whole number 831 XD is there anything I can do about it? or do I just have to take another painful stab in math?</p>
<p>I really wanted 750+ but I messed up the 5,a,b,5 question, that 8 digit Q, and the slope of line l q which on the math section equals like -80 its such a brutal curve :(</p>
<p>I’m so mad about that 5,a,b,5 q when it said a<0 it totally went over my head and I only had like 45 seconds left
Now it makes total sense
5, -1, -5, 5, -25, -125, etc :(</p>
<p>how do you solve the problem with the (k-1)/k ratio?<br>
From the consensus here, it’s apparently 8</p>
<p>^
Plug in</p>
<p>(10 char)</p>
<p>Supa_Ramga //
You got it right 
By using Ti-89, the answer came out in less than 40 seconds LOL.
I did not even think about the alegbra method.
For those who have not taken the Calc 1 yet, this question might have been tricky.
2 omitted questions are still bothering me… holy crap</p>
<p>1/k = .13
k= 7.69</p>
<p>(7.619-1)X .13(1/k) = .87</p>
<p>The tens digit is 8</p>
<p>I just did:</p>
<p>(5-1)/5=.8</p>
<p>This is true for all numbers, as far as I know, unless you were to round.</p>
<ul>
<li>dychang</li>
</ul>
<p>I use a TI-83 Calculator, I have no idea how to differentiate with it.</p>
<p>Unfortunately I left that one blank due to time (the book question was worded horribly), but I was seriously considering going back and bubbling in. In the end, however, I did not.</p>