The chess club and the ballet club of Nahk University were founded at the same time, and they each accept new members at a constant rate. The chess club accepts 555 new members each week, and it had 373737 members after 666 weeks.
The number of members in the ballet club as a function of time (in weeks) is given by the following table of values:

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:

the answer is a

step-by-step explanation: