Pertanyaan
When table values do not include the information you need, use the formula where R is the period rate and N is the number of periods.
If Barry purchases a $2,000 Roth IRA when he is 25 years old and expects to earn an average of 6% per year compounded annually over 35 years (until he is 60), how much will he accumulate in the investment?
If Barry doesn’t put the money in the IRA until he is 35 years old, how much money will accumulate in the account by the time he is 60 years old? How much less will he earn because he invested 10 years later?
Interest rate is critical to the speed at which your investment grows. If $1 is invested at 2% compounded annually, it takes approximately 34.9 years to double. If $1 is invested at 5% compounded annually, it takes approximately 14.2 years to double. Use Table 13-1 to determine how many years it takes $1 to double if invested at 10% compounded annually; at 12% compounded annually.
At what interest rate would you need to invest to have your money double in 10 years if it is compounded annually?
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Bukti:
- Investasi umur 25 (35 tahun)
- Diketahui:
- PV = 2000’r = 6
- FV = 2000(1.06)35 = 15,372.17
2. Investasi umur 35 (25 tahun)
- FV – 2000 (1.06)25 – 8,583,74
3. Selisih karena telat 10 tahun:
- 15,372.17 – 8,583.74 = 6,788.43
4. Waktu uang dobel
- 10% n = n ln2/ln 1.10 = 7.27 tahun
5. Bunga agar dobel dalam 10 tahun:
r = 2 1 /10 – 1 = 0.0718 = 7.18