Abug population doubles every week. if the starting population is 10,000, which equation models the population, y, and the number of weeks, x?

y = 10000 * (2,0)^x

Step-by-step explanation:

This is because we here will see an exponential growth, and we times the original population by the growth(here 200%) exalted in the number of weeks(x) to find the population by week(y)

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: