Question

capital que deve ser aplicado a juros simples durante 8 meses, a taxa de 36%a.a. Para produzir R$343,20 de juros é: *
5 pontos
R$14,30
R$11,90
R$1,19
R$1190,00
R$1430,00

Answer 1

$i=36\%\ \text{a.a.}=0.36\ \text{a.a.}$

$t=8\ \text{meses}=\frac{2}{3}\ \text{ano}$

$J=\text{R\ 343,20}$

$J=Cit\ \to\ \boxed{C=\dfrac{J}{it}}$

$C=\dfrac{343.2}{0.36\big(\frac{2}{3}\big)}=\dfrac{343.2}{0.24}\ \therefore\ \boxed{C=\text{R\ 1430,00}}$

Letra E.