When an aluminum cookie sheet is placed in an oven and heated up, it expands due to the temperature change.The change in area of the cookie sheet is modeled using the following equation: 
where 
change in area in 
original area in 
area coefficient of thermal expansion 
change in temperature in 
What is the appropriate unit for 
if the preceding equation is to be homogeneous in units?
Definitions:
Strikebreaking
The act of using non-union workers to replace striking employees in order to keep an organization operational during a labor strike.
Productivity
The measure of efficiency in which goods and services are produced, often evaluated by the output per unit of input.
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