Answer:
60cm
Step-by-step explanation:
30 (8)+70 (4)+40 (2)=600mm
1mm=0. 1cm
600mm=0. 1 (600)cm
600mm=60cm
it the 2nd because it has the 2 in it
0.267
0.2666666666666667
I don't know!
i think that is the second one but im not sure.