Sorry again for asking this but can someone explain this and give me the answer. Been having a hard time learning this.

If a boat travels 3 miles in 1.5 hours how far will it travel in 1 hour

Avegetable garden and a surrounding path are shaped like a square together are 12 ft wide. the path is 1 feet wide. if one bag of gravel covers 8 square feet, how manu bags are needed to cover the path? round your answers to the nearest tenth.

Iwant to know what 3g+5h+4g-2h is my teacher is too selfish to tell us