Perry deposited $90 in a savings account earning 10% interest, compounded annually. To the nearest cent, how much will he have in 3 years?

since your problem is x^4 = 81, what you have to undeo is the "to the fourth power" part.

the inverse (opposite operation) of "to the fourth power" is "to the fourth root".

  (x^4) ^ ¼   = 81 ^ ¼  

  81 = 3^4     so (3 ^ 4) ^ ¼   =   3 ^ 1   = 3

by hand: (3 ^ 4) ^ ¼   =   3 ^ (4 x ¼) = 3 ^ 1   = 3   (when you take a power to a power, multiply the exponents.)

or, do it by calculator. one way of finding the fourth root is to use ^ (1/4)

step-by-step explanation:

{3 + i, 3 - i, 3, -1}

step-by-step explanation:

i think that you should ask google for the answer to that problem because if we don't know it google does

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step-by-step explanation:

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