Which answer describes the type of sequence

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?

Does anyone know how to do geometryme with this problem

The perimeter of a rectangle is 42 inches. if the width of the rectangle is 6 inches, what is the length