Is this answer is right 90 % can anyone explain how to do this!

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

Select the number of ways in which a line and a circle can intersect

The circle below is centered at the point (3, 1) and has a radius of length 2. what is the equation?