Question

alguem me ajude por favor!?

Answer 1

a) Juros simples:

j = C.i.t
j = 2000 x (0,05) x 4
j = 400,00

M = C + j
M = 2.000 + 400 = 2.400,00

b) Juros compostos:

$M=C(1+i)^t\\ \\ M=2000(1+0,05)^4\\ \\ \boxed{M=2.431,01}\\ \\ j=M-C\\ \\ \boxed{j=2.431,01-2.000,00=431,01}$