Zap It Energy charges a standing rate of £12 per month plus £0.10 per unit of electricity used. work out how much the total cost is if you use 10 units of electricity

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