Select one answer. A researcher took a random sample of 100 students from a large university.
She computed a 95% confidence interval to estimate the average weight of the 5 points
students at this university. The confidence interval was too wide to provide a
precise estimate.
True or false? The researcher could produce a narrower confidence interval by increasing the
confidence level to 99%.
A. True
B. False

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: