how do I find the solution to 6i is greater than or equal to -42? Please help, I don't have a lot of time

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

Can someone me out here and the tell me the greatest common factor

The function show two sisters' savings account and the rate at which they plan to deposit money