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What is the greatest common factor of 8 and 36

Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label

Which is the solution to the inequality? 2 3/52 1/15 b< 3 2/15 b> 3 2/15