Question

me ajude nessa pergunta aí pf!

Answer 1

Encontrando a taxa mensal (por regime simples de juros):

$taxa_{mensal}=\dfrac{taxa_{anual}}{12\ meses}\\\\ taxa_{mensal}=\dfrac{0,80}{12}\\\\ taxa_{mensal}\approx0,06666667\ (\ 6,666667\%\ a.m.\ )\\\\\\ Encontrando\ a\ taxa\ trimestral:\\\\ taxa_{trimestral} = taxa_{mensal} \times 3\\\\ taxa_{trimestral} = 0,06666667 \times 3\\\\ taxa_{trimestral} = 0,2\ (\ 20\%\ a.t.\ )\\\\\\ Encontrando\ os\ juros\ no\ periodo:\\\\ juros = capital \times taxa_{trimestral}\\\\ juros = 1.800 \times 0,2\\\\ \boxed{juros = R\ \ 360,00}$


$Encontrando\ o\ montante:\\\\ montante = capital + juros\\\\ montante = 1.800 + 360\\\\ \boxed{montante = R\ \ 2.160,00}$


Espero ter ajudado.
Bons estudos!