Answer: "Hello, to whom am I speaking with"
Evenness means an equality between two species, or to sets of variables in mathematics, so evenness of mind and temper would be a tranquility or peace between these two parts of your body.
A ten letter word with this meaning is Equanimity.
Definition: mental calmness, composure, and evenness of temper, especially in a difficult situation.
Answer:
What do you like most about your job.
Explanation:
In a formal setting this is the best answer to pick since it stays on topic.