Expanded form is just each place value split into addition.
so 1,852 is
1000 + 800 + 50 + 2
that's all
So,
53,879 rounded to the nearest hundred:
If the number in the tens place is greater than or equal to 5, then round up. If not, round down.
7 is greater than or equal to 5, so round up.
53,879 --> 53,900
Every 60 seconds in Africa a minute passes together we can stop this
The answer that you’re looking for is b