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SashulF [63]
3 years ago
9

What's the answer ????

Mathematics
1 answer:
gizmo_the_mogwai [7]3 years ago
5 0
The mistake is line 4, she should have divided 42 by 5, not add 5 and 16
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Answer:

Step-by-step explanation:

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21*2\pi = 42\pi =42*3.14=131.88\\6.7*2\pi=13.4\pi =13.4*3.14=47.076

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