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Use the Rule of 72 to solve. Manny has his money in a savings account earning 4.5% interest. How long it will take his money to double? sixteen years twelve years two years eighteen years

Answer :

Answer:

It will take 15.76 year to double the amount

Step-by-step explanation:

We have given rate of interest r = 4.5 %

Let the principle amount is P

It is given that amount is doubled so amount A = 2P

Amount is given by [tex]A=P(1+\frac{r}{100})^n[/tex], her n is time period

So [tex]2A=A(1+\frac{4.5}{100})^n[/tex]

[tex]1.045^n=2[/tex]

Taking log both side

[tex]nlog1.045=log2[/tex]

[tex]n\times 0.0191=0.3010[/tex]

[tex]n=15.8year[/text]

It will take 15.76 year to double the amount

hannahroxx

Answer:

Step-by-step explanation:

72 divided by 4.5 equals 16

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