Suppose the length and the width of the sandbox are doubled.
the length of the sandbox is 10 and the width is 6.
a. find the percent of change in the perimeter.
b. find the percent of change in the area.

Maria walks a round trip of 0.75 mile to school every day. how many miles will she walk in 4.5 days

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)?

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