Math

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I need help solving a problem, I am stuck on this one.
Write 128 in each one of the following bases a.Five
b. Two
c. Twelve

  • Math -

    a) 128 = (5 * 25) + (3 * 1) = (5 * 5^2) + (0 * 5^1) + (3 * 5^0)
    in base 5 __ 503

    b)128 = 2^7 = (1 * 2^7) + (0 * 2^6) + (0 * 2^5) + (0 * 2^4) + (0 * 2^3) + (0 * 2^2) + (0 * 2^1) + (0 * 2^0)
    in base 2 __ 10000000

    c) 128 = (10 * 12) + (8 * 1) = (10 * 12^1) + (8 * 12^0)
    in base 12 __ A8

    9 is our largest numerical digit, so we switch to letters after that

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