There are 24 people using the gym. the ratio of men to women is 2: 1. how many men are using the gym?

The total number of "ratio units" is 2+1 = 3, so each one must stand for 24/3 = 8 people.

There are 2×8 = 16 men using the gym.

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:

first one because it can't have a fraction in it

step-by-step explanation: