You roll a fair 666-sided die. What is \text{P(roll an even number})P(roll an even number)start text, P, left parenthesis, r, o, l, l, space, a, n, space, e, v, e, n, space, n, u, m, b, e, r, end text, right parenthesis?
If necessary, round your answer to 222 decimal places.

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: