Arectangular yard is 20 yards wide and 40 yards long. it is surrounded by a thick hedge that grows on the border of the property, but completely within the boundaries of the yard. if the hedge covers an area of 171 square yards, what is the width of the hedge?

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?