Respostas

2013-08-07T08:08:53-03:00
A) a:b^2 = 10^-4 : (10^-5)^2 = 10^-4 : 10^-10 = 10^4-(-10)=10^6
b) a^2.b^2/c^2= (10^-4)^2. (10^-5)^2/(10^3)^2= 10^-8. 10^-10/10^6= 10^-18/10^6= 10^-24
c) a:(b, c)= 10^-4:(10^-5. 10^3)= 10^-4: 10^-2= 10^-2