Resposta :
Resposta:a) 5 meses
Explicação:
Ms=880,C=800,i=2/100--->0,02,n=?
Ms=C.(1+i.n)
880=800.(1+0,02.n)
880=800+16.n
880-800=800-800+16.n
80=16.n
n=80/16
n=5 meses
[tex]\sf \displaystyle 80=\frac{800\cdot 2\cdot \:x}{100}\\\\\\\sf \frac{800\cdot \:2x}{100}=80\\\\\\\sf \frac{100\cdot \:800\cdot \:2x}{100}=80\cdot \:100\\\\\\\sf 1600x=8000\\\\\\\sf \frac{1600x}{1600}=\frac{8000}{1600}\\\\\\\sf \to \boxed{\sf x=5 \ Meses}[/tex]
OK?
Kevin Davi.