Resposta:
Boa noite!
Explicação passo-a-passo:
Vamos lá!
[tex]M=C+c.i.t\\\\M=C+20000.(0,06).3\\\\M=C+20000.(0,18)\\\\M=20000+3600\\\\M=23.600,00_{reais}[/tex]
[tex]M=C+c.i.t\\\\M=C+12250.(0,05).24\\\\M=C+12250.(1,2)\\\\M=12250+14700\\\\M=26.950,00_{reais}[/tex]