When measuring distance 12 beads are approximately equal to 6 erasers. how many erasers are equal to 18 beads? how many beads are equal to 42 erasers?

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