Final answer:
Runway numbers 9 and 27 indicate the runway is oriented approximately 090 degrees and 270 degrees true, representing east and west directions respectively.
Step-by-step explanation:
The numbers 9 and 27 on a runway indicate that the runway is oriented approximately 090 degrees and 270 degrees true (Option B). These numbers are shorthand for magnetic orientation and are rounded to the nearest whole ten degrees. A runway labeled with 9 means it is oriented approximately 90 degrees from true north, facing east, while 27 indicates a runway orientation of approximately 270 degrees, facing west. The two numbers always differ by 180 degrees because they represent opposite directions on the same runway.