Question 5 of 6
How long will it take for an investment to double at simple interest rate of 5.10% p.a.?
10 years
1200 months
Express the answer in years and months, rounded up to the next month
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Answer: 9%
Step-by-step explanation:
The rule states that an investment or a cost will double when: [Investment Rate per year as a percent] x [Number of Years] = 72. The Rule of 72 indicates than an investment earning 9% per year compounded annually will double in 8 years.
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