1.

Q: If an amount doubles automatically in 8 years, then what is the interest rate?

A. $$ {12{1\over 2}}\%$$
B. $$ {15{1\over 2}}\%$$
C. 0.05
D. $$ {5{1\over 2}}\%$$
Answer» B. $$ {15{1\over 2}}\%$$


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