Can some1 plz me idk what to do : (

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

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

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.