Je donne l'écriture scientifique de B
B=(7×10^3×5×10^5)/(14×(10^2)^3
J'ai trouvé
B=2,5×10^2
B=(7×10^3×5×10^5)/(14×(10^2)^3
J'ai trouvé
B=2,5×10^2
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B = (7*10^3*5*10^5) / (14*(10^2) ^3
= (7*1000) * (5*100000) / 14*(100^3)
= 7000 * 500000 / 100000
= 3 500 000 000 / 100000
= 35000
= 3,5 * 10*-4.