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Monthly maintenance costs are distributed normally with a µ = $250 and σ = $50. Find the range around the mean that includes 99.7% of the cost.

Monthly maintenance costs are distributed normally with a µ = $250 and σ = $50. Find the range around the mean that includes 99.7% of the cost.

College Algebra (MindTap Course List)
College Algebra (MindTap Course List)
12th Edition
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:R. David Gustafson, Jeff Hughes
Chapter4: Polynomial And Rational Functions
Section4.6: Rational Functions
Problem 11SC: Find the mean hourly cost when the cell phone described above is used for 240 minutes.
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Monthly maintenance costs are distributed normally with a µ = $250 and σ =
$50.

Find the range around the mean that includes 99.7% of the cost.

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