Isaac read a total of 20 books over 5 months. after belonging to the book club for 7 months, how many books will isaac have read in all? assume the relationship is directly proportional.
(easy question i just forgot how to do it lol)

20 books / 5 months = 4 books per month

4 books  * 7 months = 28 books total

q: 92 degrees

hope i ^-^

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: