Simplify and write the answer in exponential form. 3^4 x 3^5 a.) 3^9 b.) 9^9
c.) 3^-1
d.) 3^20

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