Ravi had 8/9 acres of land. he planted 2/5 of it with corn. how many acres did he plant with corn?

First, find the common denominator of both fractions.

8/9 = 40/45

2/5=  18/45

Subtract 18/45 from 40/45

40/45 -- 18/45 = 22/45

Your answer is 22/45.

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 think the answer is seven, for if i'm being useless °ω°

step-by-step explanation: