In 1989, dutch ice skater dries van wijhe skated 200 km at an average speed of 35.27 km/h. how long was he skating?

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 average rate of change for this function for the interval from x=2 to x=4 ?

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).