It is 850, exactly as in the question.
847 rounded off to nearest tens is (a)800(b) 850(c) 840
It is abousalutly 850
It's already there.
840
855
850
850
860
850
850
It is already rounded to the nearest ten as 840
Rounded to the nearest ten: 760 Rounded to the nearest hundred: 800
800
850
850
850
800