When you round to the nearest tenth, you just look at the tenths place. In this case it's the 8. If the next number is below 5 then it stays the same. If it's above you add one. So your number would be 5,280. If the original number was 5,286 then the answer would be 5,290. Anyway the final answer is 5,280.
Assuming you meant explanatory text and not exclamation text, the answer would be brackets. For example, say your quotation is "She wrote the book." If you are quoting this directly in a paper, you want your audience to know who "she" is. So, you use brackets, and write the following: "[J.K. Rowling] wrote the book." Hope this helps.
He is poor and cant afford a great gift
