The picture attached will help you solve this equation... You go to an Italian restaurant with $31.90 to spend in a town with a 10% sales tax. Choose two meals that you could order that would allow you to tip 20% or greater to your waiter. (Hint: Figure out how much you have after sales tax first.)

Spaghetti with tomato sauce and the Marinara

Step-by-step explanation:

I think

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:

i dont know

step-by-step explanation: