20 pts! need ! explain! the amount of money a worker makes varies directly with the hourly rate of pay. worker a earns $168 for an 8 hour period. worker b earns the same hourly rate as worker a, but works for only 6 hours. what does worker b earn? a) $1008 b) $126 c) $1344 d) $160

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: