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  c

Step-by-step explanation:

The pattern has a 4-letter repeat. We can ignore some number of complete repetitions of the pattern and just look at the letter number in the next instance of the pattern.

  147 ÷ 4 = 36 r 3

The 147th letter will be the 3rd letter of the pattern after it has repeated 36 times. The third letter of {a, b, c, d} is c.

The 147th letter of the pattern is "c".

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:

answer by yourhope:

hi! : )

a farmer that lived in ancient egypt would most likely be barried in the sand, in the desert!

: )