Réponses

Meilleure réponse !
2014-04-07T20:06:01+02:00
A = (7 x 10^15 x 8 x 10-8) / 5 x 10^-4
= (7 x 8) / 5 x (10^15 x 10^-8) / 10^-4
= 56/5 x 10^7/10^-4
= 11,2 x 10^11
= 1,12 x 10^12


B = (2,5 x 10^-3 x 9 x 10^5) / 13 x 10^-4
= (2,5 x 9) / 13 x (10^-3 x 10^5) / 10^-4
= 22,5/13 x 10^2/10^-4
= 1,730769231 x 10^6
= 1 730 769,231