1. **State the problem:** Azhar wants to have 20000 in his bank account 5 years from today. The bank pays 6% interest compounded semi-annually. We need to find how much money he should deposit today.
2. **Formula used:** For compound interest, the future value $A$ is related to the present value $P$ by the formula:
$$A = P \left(1 + \frac{r}{n}\right)^{nt}$$
where:
- $A$ is the amount of money accumulated after $t$ years, including interest.
- $P$ is the principal amount (the initial money).
- $r$ is the annual interest rate (decimal).
- $n$ is the number of times interest applied per year.
- $t$ is the number of years.
3. **Given values:**
- $A = 20000$
- $r = 0.06$
- $n = 2$ (since interest is compounded semi-annually)
- $t = 5$
4. **Rearrange formula to find $P$:**
$$P = \frac{A}{\left(1 + \frac{r}{n}\right)^{nt}}$$
5. **Calculate:**
$$P = \frac{20000}{\left(1 + \frac{0.06}{2}\right)^{2 \times 5}} = \frac{20000}{\left(1 + 0.03\right)^{10}} = \frac{20000}{1.03^{10}}$$
6. **Evaluate $1.03^{10}$:**
$$1.03^{10} \approx 1.34392$$
7. **Calculate $P$:**
$$P = \frac{20000}{1.34392} \approx 14875.38$$
**Answer:** Azhar needs to put aside approximately 14875.38 today to have 20000 in 5 years with 6% interest compounded semi-annually.
Compound Interest F0594A
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