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Just to make sure, are you over 9000% that this is right? Could you explain why? Is it because greatest velocity is at a maxima, therefore acceleration = 0? But wouldn't that only work if acceleration and velocity are in erms of t (time)?? Also yeah, if it is right, then I got greatest...

Hi guys, here's the question I don't know how to do: Q. A particle is attached to the end of an elastic string; it is projected vertically downwards from the point O with velocity sqrt(22) m/s, and has acceleration (10-2x) m/s/s after it has traveled x metres. Find it's greatest velocity, and...

Sorry about this, but could someone please mark/check my solution? Basically I provided a statement in how and why the proof will work. Then I substituted P = (expression we have to prove) in to dP/dt --> and I repeated this process except I substituted the expression into kP(1-RP) --> these...

lol no, I just want to know what I have to do to answer Q3a. E.g. Step 1 --> you do this.... Step 2: You do that etc... If I got that in an exam, what would I have to do to answer the question? Because I don't understand :( EDIT --> Just wondering is there anyway to get the value of P from...

Hi guys here's a question involving logistic growth that I can't do. Q3 part a is what I am having problem with. In order to show that P = that expression, do I just sub it in dP/dt, and eventually I would get kP(1-RP)? What would I have to write as a concluding statement etc? Can someone...

So is the actual answer -sqrt(2) mm/s?? Sorry but could you please check for me? I'm not exactly confident with my mathematical abilities...

Q. A block of ice in the form of a CUBE has one edge 10cm long. It is melting so that its dimensions decrease at the rate of 1mm/s (the block always remains a cube). At what rate is the DIAGONAL decreasing: (a) initially? (when edgelength = 10cm)? (b) when the edge is 5cm long?? My...

Thanks Spiral, but I was wondering, could you please explain why my method doesn't work? I mean where exactly does it not follow the rules of mathematics and rates and changes?? e.g. like why can't I use dV/dA? thanks.

Hi guys, I'm having a bit of a problem with this question: Q. A sphere is expanding so that its surface area is increasing at a rate of 0.04 cm^2 /second. Find the rate of increase of its volume at the instant when the radius is 10cm. My solution: (please someone figure out where I went wrong)...

^repped, thanks a million mate

Hi guys need a bit of help on this question: Q. Water is poured into an inverted cone at a rate of 10cm^3 /second. The radius of the cone is 5cm and its height is 10cm. (i) At what rate is the level rising after 2 seconds? (ii) At what rate is the level rising when the level is 8cm...

Poor scaling subjects + mediocre ranks + an abysmally ranked school = 75 ATAR

thanks ganga

LOL U guys trollin me or something? I thought it'd be like 92-93. Ok so what if my marks are exactly the same in my External HSC exam, and my 4U/3U marks are slightly lower in my external HSC exam? e.g. 4U raw mark = 65%, 3U raw mark = 80%

My school is in the top 25: English Standard: avg 82% (RAW) for Modules/ avg 54% (RAW) for belonging Rank 13/57 ---------------- Ancient History: avg 75% (RAW) --> rank 20/32 Biology: avg 85% (RAW) --> rank 13/62 Extension 1 Maths: avg 91% (RAW) --> rank 9/100 Extension 2 Maths: avg 84%...

fuuuarrkk... hermes you are a beast... what are you aiming for in the hsc 3u exam? 98/99?

http://news.ninemsn.com.au/national/8275204/man-at-centre-of-lashing-allegations-talks A Muslim man who was allegedly lashed 40 times by four men who broke into his Sydney home as a punishment for drinking alcohol says his Islamic faith is a beautiful religion. Chris Martinez, 31, also said...

Anders Breivik. Christians.... *sigh*

That's just plain stupid -- I could do 17 units as well, I just would end up getting 20% for 3 particular subjects and what the fuck kind of a cunt does 17 units? To show off?

Ok, that definitely ain't no mansion...