What does an open dot on a number line signify?

Solve the triangle. a = 21°, c = 105°, c = 5

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

This graph shows which inequality? a ≤ –3 a > –3 a ≥ –3 a < –3