Suppose that a rainbow fish can swim 60 feet in 6 seconds. An angelfish can swim 45
feet in 2 seconds.
Which fish can swim faster and by how much?
The angelfish swims 4.5 feet per second faster.
The angelfish swims 12.5 feet per second faster.
The rainbow fish swims 4.5 feet per second faster.
The rainbow fish swims 12.5 feet per second faster.

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)?