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Actual rate of learning

Forums › Ask ACCA Tutor Forums › Ask the Tutor ACCA PM Exams › Actual rate of learning

  • This topic has 5 replies, 2 voices, and was last updated 1 year ago by John Moffat.
Viewing 6 posts - 1 through 6 (of 6 total)
  • Author
    Posts
  • May 21, 2021 at 10:27 pm #621372
    ythomas
    • Topics: 15
    • Replies: 18
    • ☆

    Hi sir,

    The actual rate of learning on the calculator for r^4 of 0.375 is for example.. ?(?(0.375)) =0.75

    But what if I want to find r^3 of 0.375, how would I work it out on the calculator?

    May 22, 2021 at 8:17 am #621394
    John Moffat
    Keymaster
    • Topics: 57
    • Replies: 49595
    • ☆☆☆☆☆

    You need a scientific calculator which will have a button on it for calculating the x’th root.

    There is a scientific calculator in the CBE software that you can use, and this has that button.

    May 24, 2021 at 7:09 pm #621662
    ythomas
    • Topics: 15
    • Replies: 18
    • ☆

    Hi sir…

    I’ve found a way to do it e.g

    8a(r^3)=34.3
    8(12.5)((r^3)=34.3
    r=34.3/(8*12.5))^(1/3)
    =0.70

    May 25, 2021 at 8:19 am #621692
    John Moffat
    Keymaster
    • Topics: 57
    • Replies: 49595
    • ☆☆☆☆☆

    That is fine. Taking something to the power of 1/3 is the same as taking the third root. (Just as taking something to the power of 1/5 is the same as taking the 5th root)

    It doesn’t matter which you do (although if your calculator has a button that lets you take something to the power of 1/3 then it will also have a button that lets you take the third root 🙂 )

    May 25, 2021 at 8:23 pm #621765
    ythomas
    • Topics: 15
    • Replies: 18
    • ☆

    No my calculator doesn’t allow me to do the root.

    Thank you for your help…

    May 26, 2021 at 9:05 am #621791
    John Moffat
    Keymaster
    • Topics: 57
    • Replies: 49595
    • ☆☆☆☆☆

    You are welcome (it should be above the button that lets you take any power – you press the button that says ‘2nd’ on it, and then the power button to take an nth root)

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