Il 48
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Calcolo ad interesse semplice:
tasso annuo $\small r= 2×3,5 = 7\%;$
tempo $\small t= \left(1+\dfrac{1}{2}\right)×360+20 = 540+20 = 560\,gg;$
interessi generati $\small i= 1650$€;
capitale iniziale $\small C= \dfrac{i×36000}{r×t} = \dfrac{1650×\cancel{36000}^{450}}{7×\cancel{560}_7} = \dfrac{1650×450}{7×7} = \dfrac{742500}{49} = 15153,06$€;
montante $\small M= C+1 = 15153,06+1650 = 16803,06$€.
Ι = C·i·t----> C = Ι/(i·t)
Ι = 1650 €
i = 3.5% = 0.035= saggio semestrale di interesse
t = 2 + 1 + 20/180 = 28/9 semestri
C = 1650/(0.035·(28/9))=15153.06 €
Μ = C + Ι
Μ = 15153.06 + 1650 = 16803.06 €
c=1650*36000/7*560=5940000/3920=15153,06 M=15153,06+1650=16803,06
interesse I = 1650 = C*0,035*2*(1,5+2/(3*12) = 0,108889C
capitale C = 1.650/0,108889 = 15.153,06 €
montante M = C+I = 15.153,06+1650 = 16.803,06 €
interesse I = 6250 = C(0,005*12*4) = 0,24C
capitale C = 6250/0,24 = 26.041,67 €
montante M = C+I = 32.291,67 €