Final answer:
A commercial motor vehicle with an unloaded weight exceeding 2,500 pounds can tow a maximum of one trailer. A slowly bouncing trailer on a highway is more likely to be heavily loaded.
Step-by-step explanation:
According to federal regulations, a commercial motor vehicle with an unloaded weight that exceeds 2,500 pounds may tow a maximum of one trailer. This means that the maximum number of trailers that can be towed by such a vehicle is one.
The bouncing of a trailer on a highway can be an indication of its weight. A heavily loaded trailer is more likely to bounce slowly, as the weight acts as a damping force on the bouncing motion. On the other hand, a nearly empty trailer may bounce more rapidly due to its lighter weight.
Therefore, based on the observation of a slowly bouncing trailer, it is more likely that the trailer is heavily loaded rather than nearly empty.