Final answer:
The NJ speed limit in a business or residential area, unless otherwise posted, is 25 mph in a school zone, 35 mph in a business district, and 25 mph in a residential area.
Step-by-step explanation:
The NJ speed limit in a business or residential area, unless otherwise posted, is 25 mph in a school zone, 35 mph in a business district, and 25 mph in a residential area. These speed limits are set to ensure the safety of pedestrians and drivers in areas with high traffic or pedestrian activity. It is important to obey these speed limits to prevent accidents and potential legal consequences.