Ateacher has 3 hours to grade all the papers submitted by the 35 students in her class. she gets through the first 5 papers in 30 minutes. how much faster does she have to work to grade the remaining papers in the allotted time?

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