0.25^x = 0.05

Discussion in 'Community' started by oldschool, Aug 24, 2005.

  1. oldschool macrumors 65816

    oldschool

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    Sep 30, 2003
    #1
    0.25^x = 0.05

    i can't for the life of me remember how to do this...can someone enlighten me?
     
  2. oldschool thread starter macrumors 65816

    oldschool

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    Sep 30, 2003
  3. clayj macrumors 604

    clayj

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    #3
    You mean, aside from using a calculator program to type in

    .25 [x^y] <insert number here> <ENTER>

    and figuring out that x = 2.16 something?
     
  4. swiftaw macrumors 603

    swiftaw

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    #4
    take logs of both sides:

    x ln(0.25) = ln(0.05)

    thus x = ln(0.05) / ln(0.25) = 2.16.....
     
  5. dejo Moderator

    dejo

    Staff Member

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    #5
    "No marks awarded. Please show your work." ;)
     
  6. clayj macrumors 604

    clayj

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    #6
    Yup, swiftaw's right. This works exactly. (Sobs silently as realization kicks in that much of my high school math classes have been forgotten...)
     
  7. obeygiant macrumors 68040

    obeygiant

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    totally cool
  8. Hoef macrumors 6502a

    Hoef

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    #8
    The question really is, why do you need to know? :cool:
     
  9. Abstract macrumors Penryn

    Abstract

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  10. CompUser Guest

    #10
    Seriosuly, I'm in going into 9th grade and I knew how to do that and I'm not like a genious (although I do get As in math).
     
  11. neildmitchell macrumors 6502a

    neildmitchell

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    #11
    I AM SO GLAD I AM GOING TO ART SCHOOL!

    Ok so I am working on a joke and I am totally not a joke maker, so come up with your best punch line for this.

    Q: How many creatives does it take to do math?
    A:
     
  12. clayj macrumors 604

    clayj

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    #12
    A: It really doesn't matter... they all come up with different answers no matter how many you have.
     
  13. oldschool thread starter macrumors 65816

    oldschool

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    Sep 30, 2003
    #13
    i just couldn't remember i was supposed to log....totally forgot.


    and i need it so as to solve a genetics problem
     
  14. neildmitchell macrumors 6502a

    neildmitchell

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    #14
    :) Thats a good one
     
  15. Shaun.P macrumors 68000

    Shaun.P

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    #15
    Learn the laws of logs and you might not find this as difficult.
     
  16. mpw Guest

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    Jun 18, 2004
    #16
    Don't think I ever knew. :eek:
     
  17. gwuMACaddict macrumors 68040

    gwuMACaddict

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    #17
    interesting that even though we're all such 'computer nerds' when it comes to math, we still have such different educational backgrounds and interests :D
     
  18. AmigoMac macrumors 68020

    AmigoMac

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    #18
    I really thought about something really crazy running in this thread, but...
    Disappointment.
     
  19. joecool85 macrumors 65816

    joecool85

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    #19
    Are you that poor at grammar?
     
  20. zelmo macrumors 603

    zelmo

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    #20
    Think of "maths" as the British equivalent of our American word mathematics. He didn't use bad grammer, he just lives in a different country. Ease up. :rolleyes: :)
     
  21. ejb190 macrumors 65816

    ejb190

    #21
    Logs - that's what you get when you cut down trees. Right?

    <The Botany Guy ducks>
     
  22. mpw Guest

    Joined:
    Jun 18, 2004
    #22
    Isn't mathematics Latin?
    While there may laws of logs (I've already admitted to not being science of math’ss minded) there are no laws to grammer. Don't think of grammar as laws or rules, just suggestions or guidelines. :)
     
  23. oldschool thread starter macrumors 65816

    oldschool

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    #23

    kelsey wrote the grammer laws.
     
  24. dubbz macrumors 68020

    dubbz

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    #24
    Only type of 'log' I know is the log generated by various computer programs.

    :p
     
  25. emw macrumors G4

    emw

    Joined:
    Aug 2, 2004
    #25
    Keep in mind that in the USA, we often refer to the basics of education as the 3 "Rs"

    Reading
    (w)Riting
    a(R)ithmetic

    Go figure :rolleyes:
     

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