Jolon has a sled that is 3 feet 4 inches long. how many inches long is the sled? there are 12 inches in a foot.
a. 36 inches
b. 40 inches
c. 48 inches
d. 84 inches

step-by-step explanation:

if x = 2 you have to find x to finish the problem

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: