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Mathematics, 18.03.2021 02:00 idcbrooo

I neeed helpp please Olivia wrapped a string around a circle and found it was 30 mm long.

Approximately, what is the radius of this circle?
r = 4.77 mm
r = 7.5 mm
r = 9.55 mm
r = 15 mm

I neeed helpp pleaseeeeee

Olivia wrapped a string around a circle and found it was 30 mm long.
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I neeed helpp please Olivia wrapped a string around a circle and found it was 30 mm long.

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