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  1. M

    Top Achievers in Course List (State Ranks)

    Does anyone know what mark (HSC, internal and external) was needed for a state rank in economics? All help is appreciated.
  2. M

    HSC Physics Marathon 2013-2015 Archive

    re: HSC Physics Marathon Archive I think it would be something along these lines - Scientists did not know the medium of travel for light (other waves had a medium so logically light, being a wave, was also thought to have one) observation and problem raised - The aether was the...
  3. M

    binomial problem

    From 9c0(1+x)^9, the coefficient of x^2 = 9c0*9c2 (9c2 is the coefficient of x^2 in the expansion of (1+x)^9). Similarly, the coefficient of x^2 in 9c1(1+x)^8kx^2 = 9c0 which you multiply by 9c1, giving 9co * 9c1.
  4. M

    HSC 2015 MX1 Marathon (archive)

    Re: HSC 2015 3U Marathon Could you explain your part (iii)?
  5. M

    HSC Physics Marathon 2013-2015 Archive

    re: HSC Physics Marathon Archive Analyse and assess Pauli's and Heisenburg's contribution to atomic theory. (7 marks)
  6. M

    Help 3uniy intergrand

    Thanks for clarifying. I was confused because OP had it as sin(pi/2+x)=-cosx
  7. M

    Help 3uniy intergrand

    How did you go from sin(pi/2+x) to -cosx?
  8. M

    Maths Extension 2 thoughts

    Would a 71 align to 85, considering the test was easier than previous years?
  9. M

    Multiple Choice Marking

    Do they give you the (raw) marks section by section, or do you have to request it?
  10. M

    Multiple Choice Marking

    But that's taking into account the entire state. Now there's some not so bright students.
  11. M

    General Thoughts: Economics

    What did you write about? That seems well over 4000 words, so more than 2000 words per essay.
  12. M

    General Thoughts: Economics

    When I say repay in some way or another, I meant that the receiving country must pay back either through increased trade with the providing country or by allowing greater financial flows into that country, not by repaying the aid itself. I can see your point though. I guess it is entirely up...
  13. M

    General Thoughts: Economics

    To my understanding "conditional" means it is tied aid, which means that the recipient must pay back the provider in some way or another. If this was the case, then it would be recorded on the capital account since then it would be reversible. Building a school does not entail a 'paying back the...
  14. M

    General Thoughts: Economics

    Funds to build a school is in no way conditional. Being unconditional, it should be a non-reversible transaction on the net secondary income account (ie. a debit).
  15. M

    M/C Qn

    The key words here is "all other things being equal", which implies that the exchange rate doesn't change. Hence C is the most correct answer here.
  16. M

    Global Distribution of Income/Wealth

    An inequitable distribution of income and wealth provides an incentive for individuals to work longer and harder as well as to obtain higher levels of education in the hope of receiving higher income rewards. This allows for a greater output of goods and services as well as higher human capital...
  17. M

    NAIRU multiple choice question

    I understand for the purpose of this question C is most appropriate but could you explain how an increase in AS leads to a reduction in the NAIRU? To my understanding, even if there is increased competition in the factors of production, individuals who were previously structurally unemployed...
  18. M

    Help with HSC MC Please :)

    I guess it depends on how you interpret the question. I wouldn't have chosen D because if a country fixes its exchange rate below the equilibrium rate, then it will lead to a decrease in the purchasing power of that country's currency. This is adverse during a boom as there is often high levels...
  19. M

    Trials graph question

    6. B: the graph is clearly decreasing at x=a, giving us a negative gradient function, ie., f'(a)<0. Also, since the graph is concave up at x=a the second derivative gives a positive, ie., f''(a)>0. 9. D: the value of 'a' must be 15 so that the area of the triangle is 30 units^2. (remember that...
  20. M

    NAIRU

    NAIRU refers to the non-accelerating inflation rate of unemployment i.e., the level of unemployment at which there is no cyclical unemployment. Once the NAIRU of an economy is reached, any increases in aggregate demand (such as from increasing government expenditure G) will only place upward...
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