Oh, dude, rounding 9999 to the nearest 1000? That's like asking me to care about the last digit. So, 9999 is closer to 10,000 than 9000, right? So, the rounded answer is 10,000. But who's counting, right?
Well, honey, 9999 rounded to the nearest 1000 is 10,000. It's not rocket science, darling. Just bump up that number to the next thousand and call it a day.