Question

A taxa de um cartão de crédito é de 12% a.m. Qual seria a taxa anual?

389,60%
398,56%
289,60%
368,65%
298,56%​

Answer 1

Resposta:

$\Large Taxa \: anual\: = ( {1 + taxa \: mensal)}^{12} - 1 \\ \\ Taxa \: anual = (1 + 0,12) {}^{12} - 1 \\ \\ Taxa \: anual \: = {(1,12)}^{12} - 1 = 2,8960 \times 100\\ \\ \Large\boxed{ \green{\bf Taxa \: anual = 289,60\%}} \\ \\ \Large \boxed{ \underline{ \bf \blue{ \bf \: Bons \: Estudos!}}} \\ \\ \Large \boxed{ \underline{ \bf \:24/05/2021}}$