Mariana's salary is $31,000. juan's salary is
$28,000. at the end of each year, mariana gets a
$500 raise and juan gets a $1,000 raise. after 2
years, what will be the difference between their
salaries?
21
%

$2,000   or     6.25%

Step-by-step explanation:

1000 x 2 = 2000      

28000 + 2000 = 30000 Juan's salary after 2 years

500 x 2 = 1000          

31000 + 1000 = 32000 Mariana's salary after 2 years

30000 - 32000 = 2000 difference in salary

2000/32000 x 100= 6.25 difference in salary in percentage

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:

1e+27

step-by-step explanation: