Round up the following up to three significant figures:
$(i) 34.216$
$(ii) 10.4107$
$(iii) 0.04597$
$(iv) 2808$

$(i) 34.216 \rightarrow 34.2$ (The fourth digit is $1$,which is less than $5$,so we keep the third digit as is.)
$(ii) 10.4107 \rightarrow 10.4$ (The fourth digit is $1$,which is less than $5$,so we keep the third digit as is.)
$(iii) 0.04597 \rightarrow 0.0460$ (The fourth digit is $9$,which is greater than $5$,so we round up the third digit $5$ to $6$.)
$(iv) 2808 \rightarrow 2810$ (The fourth digit is $8$,which is greater than $5$,so we round up the third digit $0$ to $1$.)