Consider a savings account paying an APR of 4% compounded semi-annually. Compare the doubling time using the Rule of 72 with the exact doubling time.
A) The Rule of 72 estimates the doubling time as 17.5 years, which overestimates the actual doubling time.
B) The Rule of 72 estimates the doubling time as 17.5 years, which underestimates the actual doubling time.
C) The Rule of 72 estimates the doubling time as 18 years, which overestimates the actual doubling time.
D) The Rule of 72 estimates the doubling time as 18 years, which underestimates the actual doubling time.
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