<p>Anyone else have an opinion on gravel question part b. did you add the initial condition of 500 or not</p>
<p>Yeah for b on the gravel they asked what arrived in total, I didn’t add what was already there, the 500. I messed up the arc sin, the answer was 1/9root(9-x2)</p>
<p>On limits, I just rely on intuition because I never bothered to memorize the rules. But don’t worry–when there were 4 minutes left in the MC no calc, I still had 4 questions left to answer. And then I started guessing like there was no tomorrow.</p>
<p>Type it in wolfram alpha, sin-1 (x/3)… I also got something around 625, that’s pretty good! All of these problems from year to year employ the same strategies- average value, max, min… In the FRQ.</p>
<p>Between .4 and 2.4, did y=sin(x2) have 2 POI and a maximum?</p>
<p>Wolfram Alpha says that arcsin(x/3) is 1/sqrt(9-x^2). Whoops.</p>
<p>There was another MC question about the tangent line to a function, I believe it was in the first few of the non-calc MC…does 2 as an answer ring a bell? the onthert answers were like square root 2 and stuff</p>
<p>gravel part b? did you do 500+ the integral or leave out the inital condition?</p>
<p>Wasn’t the area 16/pi - 4/3?</p>
<p>I left out the 500. That non calc mc with the tan was horrible, couldn’t figure it out. Idk about the arcs in 1, you need to multiply by du… Oh well.</p>
<p>@kiwisarecool: I guessed on that question because I ran out of time, and I don’t remember what I put. Sorry. 
@Northeastern123: I left out the initial condition because it asked how much gravel had arrived, which I assumed excluded how much was already there.</p>
<p>Also the picture of the derivative graphs, there was an open circle and asymptote as choices, I put the one with the sharp turn</p>
<p>@omgitsvicki: If you’re referring to the FRQ with volumes and areas, I didn’t simplify for fear that it would be wrong.</p>
<p>yep thats what i got, @optimoose</p>
<p>@kiwisarecool: Sorry, I don’t remember that one. Can you elaborate?</p>
<p>It gave you a picture of a der of a function’s graph. It had an open circle approaching from different values in it. They asked for the picture of the orginial func.</p>
<p>Does anyone remember where f’(x)=cos(x2) was decreasing, or at least that’s what I think the question was</p>
<p>@omgitsvicki, that is what I got for the area on that FRQ.</p>
<p>@kiwisarecool: I believe I put either D or E as my answer, where the graph started above the x-axis and crossed below.</p>
<p>For the cos one, I put decreasing at like .7 to 1. something. Anyone know the piano question? Yeah @Bowler, I made a stupid mistake and did 16pi instead of 16/pi -__-</p>