<p>Actually hmmm…Is it 1.6 or 1.4 miles Unsure now.</p>
<p>It was 1.4
BCer here.
You had to subtract BOTH triangles (subtract .4)</p>
<p>so it’s 1.4, not 1.2 or 1.6</p>
<p>I think it is 1.4, like you said a while ago, Indianjatt. To make the velocity to be positive, Caren has to walk forward to school. So, at 4 min, she must have walked from her house to school after getting her homework. therefore, the two “triangles” cancel each other out.</p>
<p>(I’m beginning to dislike the AP Calc exam because some parts tricked me)</p>
<p>integral(6root of x,X,25,0) doesnt equal 500… indian integrate 6radx u get 4x^(3/2)… plug in… F(25) - F(0)= 2500. Is there something u disagree with on my integral???</p>
<p>It was 1.4. I hope I can salvage a point on that part :P, I gave like a paragraph long explanation.</p>
<p>the answer is definately 500 unless some1 sees a big error.</p>
<p>no, the answer is definitely 2500 becuase it is $500 to produce the 25m cable. So, since the sale price for the cable is 3000, subtract 500, and you will get the profit, 2500.</p>
<p>My answers that I posted are all correct except for the 6a part, just add x=0.
And Jerry, I did think that it had to be differentiable at x=0 for it to be a point of inflection which was what my reasoning was but apparently not many people agree.</p>
<p>
</p>
<p>How do people keep getting 2500?
I got 2250 too. </p>
<p>I thought it was 6<em>sqrt(x) cost PER meter. x = 25 meters.
so 6</em>sqrt(25) = 30</p>
<p>$30 per meter * 25 meters = $750 production.</p>
<p>$3000 - $750 = $2250 ?</p>
<p>I had to read the problem a couple times to catch that 6*sqrt(x) was cost per meter, but maybe I still misinterpreted it?</p>
<p>Jerry how are getting 500 as the cost of production??? theres no way to show that.plug 25 in to the profit equation how do u get 2500 as an answer??? can a bc’er please help me out on this no1 else wants to actually prove the answer.</p>
<p>ih8calc, I got 2250 too… i took it as (120*25)-25(6 sq.root 25) which comes out to 3000-750=2250</p>
<p>bekindrewind i got 2250 but i seem to think its 500 now.</p>
<p>“to produce a portion of a cable that is x meters from the beginning of the cable is 6 sqrt(x) dollars per meter”</p>
<p>quoted from the problem. I feel positive that it’s 2250, nobody has explained how they came up with $500 as production cost yet to me.</p>
<p>Most people put $2500.
Can’t be $500 because it says the profit made…</p>
<p>guys calm down there is nothing you can do about it now. talking about it only brings pain</p>
<p>(120<em>25)-integration of 6</em>square root of x from (0,25)</p>
<p>shoulda just put DNE b/c since Mighty Cable Company isn’t real, it can’t make a profit.</p>
<p>xcellerator. if the profit equation in part c is true… if u plug in 25 u should get the answer to part a. CAN ANY1 plug in 25 for me into that equation. show work. i get 500 everytime. idc if u think i am wrong just some1 atleast show me the equation with ur work.</p>
<p>ncc: lol!</p>
<p>jpl: but responding to this forum is like a coping mechanism for my stress over the AP Calc exam.</p>
<p>^hahhahah
I definitely BOMBED this test. =[ i don’t care that much thou.</p>