Math

Please help me, I have to solve these problems:
My great-grandfather invested $ 9.00 in a savings account in 1909. The amount of money in the account double every 9 years.
* How much money would be in the account 99 years later?-------------
* By what percentage does the investment grow in one year?---------
* What year will it be when the value of his investment hits $ 1 million?----

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asked by Hect01
  1. 1909 = 9
    1918 = 18
    1927 = 36
    1936 = 72
    1945 = 144
    1954 = 288
    1963 = 576

    Take it from there.

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