Question

Um capital de R$16.000,00, aplicado durante 8 meses, rendeu de juros simples R$1.920,00. Determine a taxa anual.​

Answer 1

$j = cit \\ 1920 = 16000 \times i \times \frac{8}{12} \\ i = 1920 \times \frac{12}{16000 \times 8} \\ i = \frac{96 \times 3}{800 \times 2} = \frac{48 \times 3}{800} = \frac{24 \times 3}{400} \\ i = \frac{12 \times 3}{200} = \frac{6 \times 3}{100} = \frac{18}{100} = 18\%$

Answer 2

Resposta:  18%a.a.

Explicação passo a passo:

Juros simples

i=j*100/C/t

i=1920*100/16000/8*12

i=192000/16000/8*12

i=12/8*12

i=1,5*12

i=18