Respostas

2014-04-24T21:10:39-03:00
10^28 / 10^72= 10 ^28-72= 10^- 37 ou 1/10^37
2014-04-24T21:11:32-03:00
(10^4)^7 = 10^4x7 = 10^28 (10^8 . 10)^3 = (10^9)^3 = 10^27 10^28/10^27 = 10^28-27 = 10