Question

um capital de r$800,00,aplicada a juros simples,com a taxa de 2%ao mes ,resultou no montante de r$880,00 apos certo tempo .qual foi a taxa de juros ?

Answer 1

Boa noite!

Dados;

C → 800

t → ???

J → ?

i → 2%a.m → 2/100 → 0,02%a.m

M → 880

_____________

M=C+J

880=800+J

880-800=J

J=R$80,00

_____________

J=c·i·t

80=800·0,02·t

80=16t

80/16=t

t=5meses

_____________

Att;Guilherme Lima

Answer 2

$\sf \displaystyle 80=\frac{800\cdot 2\cdot \:x}{100}\\\\\\\sf \frac{800\cdot \:2x}{100}=80\\\\\\\sf \frac{100\cdot \:800\cdot \:2x}{100}=80\cdot \:100\\\\\\\sf 1600x=8000\\\\\\\sf \frac{1600x}{1600}=\frac{8000}{1600}\\\\\\\sf \to \boxed{\sf x=5 \ Meses}$

OK?

Kevin Davi.