Question

qual o juro obtido em uma aplicação de R$4000,00 a uma taxa de 23% a.a. num período de 2 anos​

Answer 1

$C=\text{R\ 4000,00}\\ i=23\%\ \text{a.a.}=\text{0,23}\\ t=2\ \text{anos}\\\\ \text{Juro simples}\ \to\ \boxed{J=Cit}\ \therefore\\\\ J=4000(\text{0,23})(2)\ \therefore\ \boxed{J=\text{R\ 1840,00}}\\\\ \text{Juro composto}\ \to\ \boxed{J=C\big((1+i)^t-1\big)}\ \therefore\\\\ J=4000\big((1+\text{0,23})^2-1\big)\ \therefore\ \boxed{J=\text{R\ 2051,60}}$