When your Bob ross beats the devil out of it, how many cats eat the soup but your dogs catch cap, how many seconds?

One expression below in undefined, and the other expression has a well defined value. which expression is undefined and explain why it has no value. which expression is defined? what is the value of that expression and how do you know? what is a different expression using a trig inverse function that is also undefined?

Arrange these numbers from least to greatest 3/5 5/7 2/9

If g^-1(x) is the inverse of g (x) which statement must be true