Given the sequence 12.3, 15.2, 18.1, 21, 23.9, ..., find the recursive formula.
A. a1=12.3 and an+1=an−2.9
B. a1=12.3 and an+1=an−0.9
C. a1=12.3 and an+1=an+2.9
D. a1=12.3 and an+1=an+1.1

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