carol gets paid $10 per hour to work as a lifeguard. This weekend, she worked both saturday and sunday. She made a total of $80. Carol worked for 5 hours on Saturday. For how many hours did she work on Sunday?

Carol worked for 3 hours on Sunday

Step-by-step explanation:

If she gets $10 an hour, then she worked 8 hours total.

80 divided by 10.

If carol worked 5 hours on sunday, she worked 3 hours on saturday

8-5 = 3

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:

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