Can someone help answer this? Is this Biased or Unbiased?

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

What is the radius of a circle with an area of 78.5 cubic inches? use 3.14 for pie

Acd that is originally priced at $15.85 red-tagged for the sale. what is the sale price of the cd