A pool was filled with 8.2x102 gallons from one hose and 9.4x10' gallons from another hose. What is the total amount of water in the pool? Express the answer in scientific notation
O 1.76x102 gallons
17.6x 102 gallons
O 17.6x 10 gallons
1.76 x 104 gallons

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: