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What is 20+(5 x 2/5 )+ 3 show your work

The given dot plot represents the average daily temperatures, in degrees fahrenheit, recorded in a town during the first 15 days of september. if the dot plot is converted to a box plot, the first quartile would be drawn at __ , and the third quartile would be drawn at __ link to graph: .

Atemperature of 1.64◦f corresponds to answer in units of ◦c.