in trapezoid abcd below ab II cd. if ae=5.2, ac=11.7 and cd=10.5, what is the length of ab to the nearest tenth?

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