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Sagot :

LOUNES59

Réponse:

150 Gm = 1.5 × 10^2 Gm = 1.5 × 10^8 km

0.5 mm = 5 × 10^-1 mm = 5 × 10^-4 m

0.4 μm = 4 × 10^-1 μm = 4 × 10^-7 m

2 × 10^-9 m = 2 × 10^-3 μm = 2 nm

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