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Hi, I'm not sure if I can get into my course with requirement 98 atar school rank 2 in 2012, now it's 4 English -15 Maths ext 2 -2/69 Maths ext 1/115 Physics - 2/60 chem 10/70 Thanks!!!

Re: HSC 2014 4U Marathon let that cube root thingo be a. noting a^3 = 30+18a, it follows that a^3-18a-30=0. therefore, P(x)=x^3-18x-30 A more rigorous proof would prove that its the lowest degree. I would probably do something like square it and show you get something you can't cancel with...

Re: HSC 2014 4U Marathon Squaring both and adding gives you 2*(expanded form of cos(a-b)) + 2 =8/3 (since sin^2a+cos^2a=1) So cos(a-b)=1/3 P.s. Sorry for ugly formatting, don't have the time right now to learn latex, maybe later. D:

Yo, really grateful for this! First post after a long time of lurking - I'm sure it'll be worth it :)

Umm actually each record is 60bytes, each character is one byte :P

Have you guys considered whether Q12 is C? because technically Kb is kilobits, not kilobytes... My friend pointed this out to my after the test and i was like: "are you joking?" T.T