Using 10% as a benchmark, 20% of 390 can be found by adding 38 + 40.
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An angle that measures between 90 and 180° is called a(,

Polynomial that can be factored as (3x-4)(3x+4)

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