Edward deposited $9,000 into a savings account 4 years ago. The simple interest rate is 5%. How much money did Edward earn in interest over the 4 years?

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?

What is the area of triangle abc if a = 8, b = 11, and c = 15?

What is the greatest number of parts of a circle that can be formed by cutting the circle with 7 straight cuts? (note: the parts do not have to be equal in size)