Can someone help me with this

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out

What is r i 4.5+10r=-6.5 with work pls

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