Final answer:
At an uncontrolled intersection, the vehicle to the right typically has the right of way. Drivers should also adhere to posted speed limits and be vigilant to ensure safety, particularly when pedestrians are present.
Step-by-step explanation:
When two cars arrive at an uncontrolled intersection at the same time, the general rule that applies is that the car to the right has the right of way. This rule is designed to prevent confusion and potential collisions. However, all drivers should exercise caution and be prepared to yield if it is necessary to ensure safety. It's important for all drivers to reduce their speed according to the posted speed limit to maintain safety, especially when visibility of the intersection is not clear or when pedestrians are present.