We know that 4 and below rounds down and 5 and above round up
That means she walked 3.5 miles her sister walked 1.2 miles
and her brother walked 0.9 miles
1.2+0.9=2.1
3.5-2.1=1.4
B about 1.4 miles
Answer:
the last option hope this helps
Step-by-step explanation:
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or 
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Answer:
C
Step-by-step explanation:
This one I did already You're welcome