If the Number of Bacteria in a Culture Grows from 20,000

Multiple Choice

If the number of bacteria in a culture grows from 20,000 to 60,000 in 2 hours, then the growth constant is

A) $\frac { 3 } { \ln 2 }$
B) $\frac { 2 } { \ln 3 }$
C) $\frac { \ln 2 } { 3 }$
D) $3 \ln 2$
E) $\frac { \ln 3 } { 2 }$