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Mathe exercise

A mathe exercise:

We are now going to find the starting amount and the final amount.

Formula:

K = K0 (1 + r)n

r = rate

K0 = starting amount

K = final amount

n = number of periods

Starting amount

Rate

Number of periods

Final amount

117,00

11 %

5

1000,00

5 %

17

6 %

4

2765,88

17,75 %

10

5789,76

Posted in Group10.


8 Responses

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  1. guerinep says

    We have found the solution :

    K=KO*(1+r)n
    K=117.00*(1+11%)*5= 649.35

    K=1000.00*(1+5%)*17 = 17850

    2765.88 = KO*(1+6%)*4
    KO = 652.33

    5789.76 = KO*(1+17.75%)*10
    KO = 491.7
    Thank you
    Bye Bye

  2. Josephine says

    your answer to the exercise is wrong, because the rate should be in decimal.
    So 6% is 0,06.

    Try doing that with all the calculations 🙂

  3. guerinep says

    Oups !! We are not very gifted. We are a little bit tired so the rigth answer is

    K= 117.00*(1+0.11)*5 = 649.35 ?

    K= 1000.00*(1+0.05)*17 = 17850 ?!

    2765.88 = KO*(1+0.06)*4
    KO =652.33 ?!!

    5789.76 = KO*(1+0.1775)*10
    KO = 491.7 ??!!

    We don’t understand we found exactly the same answer. Where is the problem ?

  4. Josephine says

    okay, now I found the mistake.
    You aren’t supose to multiply with n. You need to exalt it in n.
    That is why your results are the same as mine.

  5. guerinep says

    We don’t understand. We must multiply to the power n ?

  6. guerinep says

    Now we try AGAIN using to the power n :

    K = 117.00*(1+0.11)^5 = 197.15

    K = 1000.00*(1+0.05)^17 = 2292.01

    2765.88 = KO*(1+0.06)^4
    KO = 2190.83

    5789.76 = KO*(1+0.1775)^10
    KO = 1129.92

    It’s more logical isn’t it ?
    I hope it’s the good answer
    I won’t restart all the calcul.

  7. Josephine says

    now it is right 🙂 good

  8. guerinep says

    Cool !! We have save our honnor. What is our mark ?
    You must give us a good mark because you don’t give all the information. 😉

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