Every 5 days the local sandwich shop sells tomato and cheese sandwiches. every 2 days the sandwich shop sells veggie sandwiches. how often are both sandwiches served on the same day?

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