Answer: it is 8400
Step-by-step explanation:Find the number in the hundred place 
9
 and look one place to the right for the rounding digit 
6
. Round up if this number is greater than or equal to 
5
 and round down if it is less than 
5
.
84000
if u need more math answers there is a cool website free of use called "mathaway" and i use it on all of my assignments and it really helps, i hope that i was useful!