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  1. Scafalon40

    Mathematics: Post your doubts here!

    You need the class boundaries to calculate the midpoint, don't you?
  2. Scafalon40

    Mathematics: Post your doubts here!

    But that means the class width is 10, and there is no way you can get a midpoint of 4.5, as it says in the markscheme.
  3. Scafalon40

    Mathematics: Post your doubts here!

    Yeah exactly. So the boundries are something like: -0.5-9.5 9.5-19.5 19.5-34.5 Correct or not?
  4. Scafalon40

    Mathematics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s11_qp_63.pdf ms http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s11_ms_63.pdf Have a look at Q3 part iii. Could you tell me the class boundries for...
  5. Scafalon40

    Mathematics: Post your doubts here!

    Interesting. Dug's method make sense. Thanks for sharing, Dug! Any thoughts, PhyZac?
  6. Scafalon40

    Mathematics: Post your doubts here!

    Anyone? PhyZacDug
  7. Scafalon40

    Mathematics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_s11_qp_61.pdf Why are the midpoints in Q6 part (iv) 50.5, 125.5 etc instead of 50, 125...
  8. Scafalon40

    How was your chemistry p5 ?

    I really don't care how it went -_-
  9. Scafalon40

    AKU 2013

    Honestly I think that your scores are fine. They'll be looking out for good A level grades though, so don't worry much about your SAT scores and concentrate on your A levels:-)
  10. Scafalon40

    Mathematics: Post your doubts here!

    Yeah I think so, thanks :) So, if we let y=z^2, we get the same equation as in part (i) and the same solutions i.e y=-2 etc but y=z^2 so z^2=-2 and z=sqrt(-2) so z=+/- sqrt(2) Thanks :)
  11. Scafalon40

    Mathematics: Post your doubts here!

    Thanks! Could you also explain why we need square roots in Q10 part ii b of the same paper please?
  12. Scafalon40

    Mathematics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_w10_qp_33.pdf Q 4 part (ii) please This is worth only 3 marks, I'd prefer a method which take into account this fact :) PhyZac :) could you help or anyone else
  13. Scafalon40

    Mathematics: Post your doubts here!

    Yeah I just got it! I just realised that I took 90 degrees to mean pi instead of 1/2pi :confused: Thanks man, I appreciate it :) And neat username: phyzac (fy-zc) rhymes with Issac (as in Newton). Cool:cool:
  14. Scafalon40

    Mathematics: Post your doubts here!

    Thanks dude! I'll wait for Q10 :) About Q9 (i): set up the three equations: 3-t=4+q(a) -2+2t=4+q(b) 1+t=2-q t stands for lamda and q stands for 'mu' Tidy up the equatins: q(a)+t=-1..............................(1) q(b)-2t=-6..............................(2)...
  15. Scafalon40

    Mathematics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s12_qp_33.pdf Q9 (iii) and 10 part b ii PhyZac last question for the day :p
  16. Scafalon40

    Mathematics: Post your doubts here!

    Dude you're a life saver! Thanks!
  17. Scafalon40

    Mathematics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_s12_qp_32.pdf Q10 part (iii) please!
  18. Scafalon40

    Mathematics: Post your doubts here!

    Thanks! : )
  19. Scafalon40

    Mathematics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_s12_qp_31.pdf Q3 part (ii) b please! PhyZac
  20. Scafalon40

    Mathematics: Post your doubts here!

    (y)
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