A Traffic Accident Was Witnessed By $\frac { 1 } { 12 }$

Short Answer

A traffic accident was witnessed by $\frac { 1 } { 12 }$ of the residents of a small town. The number of residents who had heard about the accident t hours later is given by a function of the form $\frac { B } { 1 + C e ^ { -k t } }$ , where B is the population of the town. If $\frac { 1 } { 5 }$ of the residents had heard about the accident after 1 hours, how long did it take for $\frac { 1 } { 4 }$ of the residents to hear the news? Round your answer to two decimal places.