Help me please will give you brainlist if you show the workk

If 1/2 is half of 1, what is 1/2 of 2,3, and 4?

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

The value of cos 30° is the same as which of the following?