100,000 divided by 600

Can someone pls ! pls answer all. no explanation needed..

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

Solve the inequaliy: (x^2+2)(x−2)^2(6−2x)> 0