A5-digit number has the digits 0,5,7,9 and 0. to the nearest thousands, it rounds to 80,000. what is the number? explain

Hey mate!
You stuck, huh?

A 5-digit number has the digits 0,5,7,9 and 0 could equal to, 79,500.
For you do understand why this number rounds to 80,000, we can take out the last 3 digits in each number. Therefore leaving you with, 79 an 80. As you can see, 79 can round to 80 because of it's value. Thus, you have your answer!

Hope this helps!