The number of customers visiting a local museum since the year 2000 can be modeled by the expression −3x^2 − 27x + 825, where x is the number of years since 2000. Factor this polynomial.

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:

b.-4 units

all you   do is count how many times you move

it would take 7/10 of an hour too fill the pool.

step-by-step explanation: