Shannon made a scale drawing of a farm. The scale she used was 1 centimeter : 9 meters. The actual length of the goat pen is 18 meters. How long is the pen in the drawing?

Answer 1

To find out the length of the pen in the drawing, we need to use the given scale of 1 centimeter: 9 meters.
Since the actual length of the goat pen is 18 meters, we divide it by the scale factor of 9 meters: 18 meters / 9 meters = <<18/9=2>>2 centimeters.
Therefore, the length of the pen in the drawing is 2 centimeters. Answer: \boxed{2}.