Question

Qual taxa mensal que faria um capital de 50.000 reais render 9.000 reais de juros em 6 meses

Answer 1

juros = 9.000
capital = 50.000
taxa = ?
tempo = 6 meses

juros = capital x taxa x tempo
9.000 = 50.000 x taxa x 6
9.000 = 300.000 x taxa
taxa = 9.000 / 300.000
taxa = 0,03  >> 3% a.m

Answer 2

i=j*100/C/t

i=9000*100/50000/6
i=900000/50000/6
i=18/6
i=3

Resposta: Taxa de 3%a.m.