math

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I have no idea how to do these please help(:
evaluate each of the following

1. 81^-1/4 (81 to the negative power of one fourth)
2. 125^2/3
3. 64^-3/2
4. 4^3/2
answers and work please

  • math -

    81^-(1/4)
    = 1/81^(1/4)
    well 81=9*9 which is 3*3*3*3
    so
    3
    so the answer is 1/3

    125 = 5*5*5
    so
    125^(1/3) = 5
    5^2 = 25
    so the answer is 25

    I bet you know 4^(1/2)
    and I bet you can cube that.

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