If an investment earns an APR of r, as a decimal, compounded annually, then the time D, in years, required for the investment to double in value is given by log(2) Tog(1 + r)" (a) Find the doubling...

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Extracted text: If an investment earns an APR of r, as a decimal, compounded annually, then the time D, in years, required for the investment to double in value is given by log(2) Tog(1 + r)" (a) Find the doubling time (in years) for an investment subject to an APR of 4% if interest is compounded annually. (Round your answer to two decimal places.) 14.208 X yr