How do you expand log equations? me . asap

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?

Find the average speed of a rabbit that runs a distance of 22 m in a time of 1.8 s .

Which of the following is the graph of y= square root -x-3