In what year will the investment be expected to double?

Essentials Of Investments
11th Edition
ISBN:9781260013924
Author:Bodie, Zvi, Kane, Alex, MARCUS, Alan J.
Publisher:Bodie, Zvi, Kane, Alex, MARCUS, Alan J.
Chapter1: Investments: Background And Issues
Section: Chapter Questions
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Personal finance advisors sometimes use the
"Rule of 72" to estimate how long it will take for an
investment to double if it earns a certain percent
per year.
The Rule of 72 says that the amount of time for an
investment to double, in years, can be estiimated
by taking the number 72 and dividing by the
percent it earns per year.
For example, if an investment earns 2% per year,
72
then it will take
2
36 years to double the
investment.
Suppose an investment earns 3% per year. It
starts with $7200 in the account in 2012.
In what year will the investment be expected to
double?
Transcribed Image Text:Personal finance advisors sometimes use the "Rule of 72" to estimate how long it will take for an investment to double if it earns a certain percent per year. The Rule of 72 says that the amount of time for an investment to double, in years, can be estiimated by taking the number 72 and dividing by the percent it earns per year. For example, if an investment earns 2% per year, 72 then it will take 2 36 years to double the investment. Suppose an investment earns 3% per year. It starts with $7200 in the account in 2012. In what year will the investment be expected to double?
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