Sam has a beaker with a capacity of 50 milliliters. He puts 20 milliliters of alcohol
in the beaker. The inequality x + 20 < 50
can be used to determine x, the number
of millimeters of liquid that can then
be added to the beaker. Which number
line best represents the solution to the
inequality?
F
0
0 5 10 15 20 25 30 35 40 45
G
+ +
5 10 15 20 25 30 35 40 45
H
+
+ ++
5 10 15 20 25 30 35 40 45
0
+ +
0 5 10 15 20 25 30 35 40 45
OF
G

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)?