A Rumor Is Spread by Word of Mouth to a Potential

Short Answer

A rumor is spread by word of mouth to a potential audience of 3000 people. After t days, $f ( t ) = \frac { 3000 } { 1 + 25 e ^ { - 0.7 t } }$ people will have heard the rumor. The graphs are shown below.


-Approximately when will the rumor be spreading at a rate of 200 people per day? Enter just two integers a, b where a< (round to the nearest integers).