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Approximation Doubling

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Use the approximation doubling formula (rule of 70) and discuss rather the formula is valid for the following case; "If oil consumption is increasing at a rate of 2.2 per year what is its doubling time? By what factor will oil consumption increase in a decade?"

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The expert examines approximation doubling.

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Hi there,

Thanks for letting me work on your post. Here is my explanation:

The "rule of ...

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