How many pounds of candy that sells for .77 per pound must be mixed with candy that sells for 1.19 per pound to obtain 9 pounds of a mixture that should sell for .93 per pound?

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