Three tenths of the 400 acres were planted with alfalfa
a. what percent of the land was planted with alfalfa?
b. how many of the 400 acres were not planted with alfalfa?

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