Positive whole numbers less than 13

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b

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

Which expression and diagram represent “renee biked four times as far this month as last month”?