I would help you with your math homework, but I have never been very good at Math. It is the correct answer because It connects to two equal independent clauses whereby each can stand alone. For example
I would help you with your Math homework. It barely stands alone.
I have never been very good at work. It also stands alone.
Answer:
21,300
Explanation:
Since the two is next to the five you round up
1. English is spoken all over the world.
2. Children under sixteen are not admitted by us.
3.Let the bill be paid today.
4. A novel was read by me yesterday.
5. The box is cleared three times a day by postman.
6. I am greatly astonished by your behavior.
7. Let it be told to them to leave the room at once.
8. Great things are done by great men.
9. A letter is being written by her.