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dangina [55]
2 years ago
13

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?
Mathematics
2 answers:
Snowcat [4.5K]2 years ago
5 0
If Manny's initial money in the savings account is x, we are to calculate for the period in which Manny's money becomes 2x. The calculations are shown 
                                               2x = x (1.045)^n
Cancelling both x from the equation and the computing for value of n will give us an answer of 15.75 years. 
sasho [114]2 years ago
4 0

Answer: 16 years is how long it will take for his money to double.




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Answer:

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Step-by-step explanation:

You can either get 30% of 400 first then 25% of 400 or you can get the total percentage of 400.

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Method 2:

30% of 25% = 0.3 * 0.25 = 0.075 = 7.5% of 400

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