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If the interest rate is r percent, then the rule of 70 says that your savings...

If the interest rate is r percent, then the rule of 70 says that your savings will double about every

Question 15 options:

70(1 + r)/r years.

70/(1 + r) years.

70/(1 - r) years.

70/r years.
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Answer #1

Answer

Option 4

rule of 70 is:

amount double in years =70/ rate of growth

so

it is

years =70/r

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