Princess was fishing for pier that was 6.1 feet above the surface of the water. after she released her fishing line it was 19.2 feet below the surface of the water. which of the expression below can be used to find how much fishing line princess released?

6.1-(-19.2)

Hope Your Thanksgiving Goes Well, Here's A Turkey

-TheKoolKid1O1

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: