Final answer:
The 'fast lane' on a highway is usually the third lane from the on-ramp or closest to the median, not numbered. Safety for a rabbit crossing a freeway depends on traffic conditions. Time for crossing cannot be calculated without the rabbit's speed.
Step-by-step explanation:
When considering the numbering of lanes on a highway, the fast lane is often referred to as the lane furthest from the on-ramp or the lane closest to the median, which is typically used for passing or faster-moving traffic. In a highway with three lanes, this is generally the third lane. However, the concept of a fast lane is not officially numbered in a standardized way across different regions. It is more commonly known by its position or purpose rather than a designated number.
Regarding the safety of a rabbit attempting to cross a freeway, if the car is in the furthest lane from the rabbit, and there are no other vehicles posing a risk, theoretically, the rabbit should be able to cross all three lanes safely. However, traffic conditions are unpredictable, and it's generally unsafe for animals to attempt to cross freeways.
For the calculation on how long it will take a rabbit to cross a freeway with three lanes each being 3 meters wide, you would need to know the speed of the rabbit. As the exact speed of the rabbit is not given, we cannot calculate the crossing time.