Which expression can be used to find the output numbers in the table

Need on this geometry question. explain how you did it.

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

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)