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Sagot :

VINS

bonjour

B = 7 x 0.04 x 10 ³  : 2 x 2.5 x 10 ⁻⁴ x 10 ⁻¹⁵

B = 0.28 x 10 ³ : 5 x 10 ⁻¹⁹

B = 0.056 x 10 ²²

B = 5.6 x 10 ²⁰

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