Réponses

2014-10-09T19:12:52+02:00
= ( 1,5 x 10^8 ) x ( 4 x 10^4 )
= ( 1,5 x 100 000 000 ) x ( 4 x 10 000 )
= 150 000 000 x 40 000
= 6 x 10^12