You are required to take five courses, one each in humanities, sociology, science, math, and music. You have a choice of 4 4 humanities courses, 6 6 sociology courses, 5 5 science courses, 7 7 math courses, and 4 4 music courses. How many different sets of five courses are possible?

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)

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he has now walked a total of what?

if i know what this is maybe i can

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answer: the answer is e

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