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What amount would have to be invested at the end of each year for the next 8 years at 4% compounded semi-annually in order to have 5,000 at the end of the time?

Sagot :

The formula is:

[tex]A=P(1+ \frac{r}{n} ) ^{(n)(t)} [/tex]

where:
A = amount accumulated;  Php 5,000
P - principal/amount inversted; unknown
r = interest rate (compounded) at 4% or 0.04
n = compounding per period; semi-annually; 2
t = number of periods, 8 years

nt = (2) (8) = 16

Equation: 
[tex]5,000 = P (1 + \frac{0.04}{2} ) ^{16} [/tex]

[tex]5,000 = P (1.02) ^{16} [/tex]

[tex]5000 = P (1.373)[/tex]

[tex]P = \frac{5,000}{1.373} [/tex]

P = 3,641.66 or 3,642.00

The amount invested is Php 3,642.00