2. The concentration of a substance in a solution is 2 x 10- milligrams per milliliter. How many milligrams are in 3 x 108 milliliters?
A. 6 x 10-13
B. 5 x 1013 C. 5 x 103 D. 1 x 10-40
E. 6 x 103

There are two major tests of readiness for college: the act and the sat. act scores are reported on a scale from 1 to 36. the distribution of act scores in recent years has been roughly normal with mean µ = 20.9 and standard deviation s = 4.8. sat scores are reported on a scale from 400 to 1600. sat scores have been roughly normal with mean µ = 1026 and standard deviation s = 209. reports on a student's act or sat usually give the percentile as well as the actual score. the percentile is just the cumulative proportion stated as a percent: the percent of all scores that were lower than this one. tanya scores 1260 on the sat. what is her percentile (± 1)?