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  1. tanmaydube

    Bad result in AS level what to do?

    In which subjects are you giving retake and why? not good? Man I am totally confused what to do?
  2. tanmaydube

    Bad result in AS level what to do?

    Buddy but what should I do now?
  3. tanmaydube

    Bad result in AS level what to do?

    but what about Chemistry and Mathematics?
  4. tanmaydube

    Bad result in AS level what to do?

    I had 4 subjects, got the following grades C in Physics D in Mathematics E in Chemistry U in English Language I am very uncertain, please help me! I guess I should repeat mathematics, chemistry and e.l. but i was wondering whether the CIE chooses the best result or the second time result for...
  5. tanmaydube

    Mathematics: Post your doubts here!

    Find how many different odd 4-digit numbers less than 4000 can be made from the digits 1,2,3,4,5,6,7 if no digit must be repeated. (Ans: 200) PLEASE EXPLAIN AND SOLVE because I have not understood THANKs A Lot!!!!!
  6. tanmaydube

    Physics: Post your doubts here!

    A rubber rope of mass m and length x is stretched by a tension force T. When the rope is moved up and down a wave moves along the rope with a velocity v. Which equation is homogeneous and thus could be correct? A v2=Tmx−1 B v2=Tm−1x−1 C v2=Tm−1x D v2=Tmx Please explain thank you!
  7. tanmaydube

    Mathematics: Post your doubts here!

    Find the first three terms in the expansion, in ascending power of x, of (2+5x)^12. By substituting a sutible value for x, find an approximation to 2.005^12 to 2 decimal places. (Ans: 4220.57) Thank you for helping.
  8. tanmaydube

    Physics: Post your doubts here!

    please share the list of formulas and definitions for as level thank you for helping...
  9. tanmaydube

    Physics: Post your doubts here!

    http://www.xtremepapers.com/CIE/International%20A%20And%20AS%20Level/9702%20-%20Physics/9702_s06_qp_2.pdf Q5) a),b) and c) THANKS A LOT!
  10. tanmaydube

    Mathematics: Post your doubts here!

    The random variable X is the length of time in minutes that Jannon takes to mend a bicycle puncture. X has a normal distribution with mean μ and variance σ2. It is given that P(X > 30.0) = 0.1480 and P(X > 20.9) = 0.6228. Find μ and σ.(ANS: σ = 6.70 μ = 23.0) THANK YOU FOR HELPING!!!
  11. tanmaydube

    Mathematics: Post your doubts here!

    Trignomentry please Help Find the sum of cos(π/19)+cos(3π/19)+cos(5π/19)..............+cos(17π/19). THANK YOU FOR HELPING!!!!!
  12. tanmaydube

    Mathematics: Post your doubts here!

    q) A 'supa-ball' is dropped from a height of 1 metre onto a level table. It always rises to a height equal to 0.9 of the height from which it was dropped. How far does it travel in total until it stops bouncing?(ans= 19m) THANK YOU FOR HELPING!!!!
  13. tanmaydube

    Mathematics: Post your doubts here!

    please help me with these questions on this thread. http://www.xtremepapers.com/forums/viewtopic.php?f=26&t=12175
  14. tanmaydube

    as geometric sequence help please

    q1) If x, y and z are the first three terms of a geometric sequence, show that x^2, y^2 and z^2 form another geometric sequence. q2)Different numbers x,y and z are the first three terms of a geometric progression with the common ratio r, and also the first, second and forth terms of an...
  15. tanmaydube

    binomial distribution (as level) help thank you!

    (6) Charlie finds that when she takes a cutting from a particular plant, the probability that it roots successfully is 1/3. Find the number of cuttings that she should take in order to be 99% certain that at least one cutting root successfully.(Ans=12). THANK YOU!
  16. tanmaydube

    Probability Distribution help fast

    Exam marks, X, have mean 70 and standard deviation 8.7. The marks need to be scaled using the formula Y = aX +b so that the scaled marks, Y, have mean 55 and standard deviation 6.96. Find the values of a and b.(ans: a=0.8 and b=1) thank you for helping!
  17. tanmaydube

    as sequence help please

    q1) The r th term of an arithmetic progression is 1+4r. Find, in terms of n, the sum of the first n terms of the progression.(Ans: n(2n+3) ) q2)The sum of the first twenty terms of an arithmetic progression is 50 , and the sum of the next twenty terms is -50. Find the sum of the first hundred...
  18. tanmaydube

    Physics 9702

    It is B because it will only reach half the value of h and the transfer of water from vessel X to vessel Y will stop. So since only water is transferred of height h/2 putting the value of h = h/2 in P.E = mgh and also since only half of the mass of water is transferred then m = m/2 so putting...
  19. tanmaydube

    Physics 9702

    the total mass remains the same but that its centre of gravity will only be 1⁄4h above the base after the tap is opened. So p.e.=m*g*1/4h=mgh/4 So the answer is B.
  20. tanmaydube

    stats help as level

    i can't get these three questions mate 15. Find the total number of different arrangements, taking all the letters at the same time, of the letters of the word MATHEMATICAL. 16. Calculate the number of different arrangements, taking all the letters at the same time, of the letters in the...
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