Answer:

1. 10 km/s

2. 9.09 km/s

3. 12 km/s

4. 9.375 km/s or 9.38 km/s

5. 7.89 km/s

6. 11.53 km/s or 11.54 km/s

7. 10.71 km/s

8. 12.5 km/s

Explanation:

hope it can help:))