A store has a sale where every item has a sale price that is 10% less than the regular price. Write an expression that represents the sale price of an item if the regular price is p dollars." London said, "To find 10% of a number, I should multiply by 0.10. So the sale price of an item will be 0.10p."

Which statement best describes London's reasoning?

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: (-6,3)

step-by-step explanation:

the second option

step-by-step explanation: