For a Certain Culture the Equation $Q ( t ) = Q _ { 0 } e ^ { 0.9 t }$

Multiple Choice

For a certain culture the equation $Q ( t ) = Q _ { 0 } e ^ { 0.9 t }$ , where Q 0 is an initial number of bacteria and t is time measured in hours, yields the number of bacteria as a function of time. How long will it take 600 bacteria to increase to 3,600? Please round the answer to the nearest tenth.

A) 2.0 hours
B) 1.0 hours
C) 7.0 hours
D) 5.0 hours
E) 4.0 hours