Please help! What would be the domain of each line?
Answer and explanation please I am so confused :\

Shiny white dental insurance costs $258 per year. approximately one-third of insured people need a filling, which averages $110 each. 80% of insured people get a preventive check-up each year, and the average cost of this visit is $95. if you consider shiny white’s income and expenses, what is the expected value of each insured customer?

If you answer 2+2 you will get over 80 points

Hurry which expression is equivalent to 3√x^5y?