Who is drinking the fastest

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?

Divide. write in the simplest form. 4 1/6 divided by 10

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?