Explain how you know the number of decimal places that should be in the product

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?

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

Solve each equation using the quadratic formula. find the exact solutions. 6n^2 + 4n - 11