Aprogram on television ran 30 minutes. the program ran seven minutes longer than three times the length of the commercials. use the guess and check method to find the number of minutes the commercials ran during the program. a. 12.3 b. 3.7 c. 7.7 d. 22.3

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:

stop cheating

step-by-step explanation: