You opened your first savings account 3 months ago. so far, you have earned $9.90 in simple interest, at an annual interest rate of 6%. how much money did you put in the account when you opened it?
never mind its $660

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