This is my first time using I don't know if I'm doing this correctly.

Question and answers are in the attached picture. you so much in advance.

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

Can you me find the missing length. i attached an image.