Joe sullivan invests $9,000 at the end of each year for 20 years. the rate of interest joe gets is 8 percent annually. the final value of joe's investment at the end of the 20th year on this ordinary annuity

The mean finish time was 185.52 with a standard deviation of 0.327 minute. the winning car driven by chris finished in 185.13. the previous year race had a mean finish time of 110.3 with a standard deviation of 0.106. the winning car that year driven by karen finished in 110.13 minutes. find their respective z-scores. chris - z-score karen “- z-score