Resposta :
Explicação passo-a-passo:
M = C + j = 1 200
C = 950
j = 1 200 - 950 = 250
t = 9 m
M = C * ( 1 + i )^t
1200 =950 * ( 1 + i )^9
1200/950 = ( 1 + i)^9
( 1 + i)^9 = 1,263
1 + i = 1,263^1/9
1+ i = 1,02628
i = 1,02628 - 1
i = 0,2628
i = 0,2628 * 100
i = 26,28 % a m