Final answer:
The Harrison family has 29.4 kilometers left to drive to reach their destination after having already covered 123 kilometers of a 152.4-kilometer journey.
Step-by-step explanation:
The Harrison family needs to calculate the remaining distance of their journey to visit their relatives. They have already driven 123,000 meters, which is equivalent to 123 kilometers since 1 kilometer equals 1000 meters. The total journey is 152.4 kilometers. To find out how much further they have to drive, we subtract the distance already covered from the total distance.
- Total journey: 152.4 km
- Distance driven so far: 123,000 m or 123 km
- Remaining distance = Total journey - Distance driven
Remaining distance = 152.4 km - 123 km = 29.4 kilometers