Which factor did the railroad contribute to by encouraging population growth in West Texas from 1870 to 1890? a) more expansion of the reservation system

b) more settlers coming to the region

c) more renegades forming communities in the area

d) more deserters establishing cities ​

A

Step-by-step explanation:i took the test

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:

goog may have it for you