The Number of Periods Needed to Double an Investment When $\mathrm { n } = \frac { \ln 2 } { \ln 1.055 }$

Multiple Choice

The number of periods needed to double an investment when a lump sum is invested at 11%, compounded semiannually, is given by n $\mathrm { n } = \frac { \ln 2 } { \ln 1.055 }$ . Find n, rounded to the nearest tenth.

A) 12.9 periods
B) 15.9 periods
C) 17.9 periods
D) 8.9 periods