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Sagot :

VINS

bonjour

Cos ABC = 4/5

Arccos ABC = 36.8698.... donc environ 36.9 °

x² + 2 x - 15  = 0

9 + 6 - 15 = 0

0.7 x = 49

x = 70

ancien prix  = 70 €

urne  1  = 35/100 = 0.35

urne  2 = 19/ 50 =  0.38  

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