Thomas lives 350 miles from the beach. He drives to the beach at an average rate of 50 miles per hour. Use that information and the diagram to complete the statements below. As time increases from 0 to 7 hours, the distance traveled
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As time increases from 0 to 7 hours, the distance remaining
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As time increases from 0 to 7 hours, the distance from home to the beach
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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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