The bacteria in a 11-liter container double every 3 minutes. After 55 minutes the container is full. How long did it take to fill a quarter of the container?
A) 13.8 min
B) 27.5 min
C) 49 min
D) 41.3 min

Question

Quizplus · Accepted Answer

Since the bacteria double every 3 minutes, and the container is full after 55 minutes, it would be half full at 52 minutes (since 55 - 3 = 52). Following this pattern, to find when the container was a quarter full, we subtract another 3 minutes, which gives us 49 minutes.

The Bacteria in a 11-Liter Container Double Every 3 Minutes