Medication is prescribed in 6 out of every 10 hospital emergency room visits that involve an injury. if a large urban hospital had 930 emergency room visits involving an injury in the past month, how many of these visits would you expect included a prescription for medication?

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