In a jar we have a sample of 55 bacteria which, due to lack of beneficial conditions for survival, are now dying at a constant rate of - In (4) per member per hour. (a) How many hours did it take for the jar of bacteria to become half empty ? (Give your answer in exact form.) 5 Your last answer was interpreted as follows: 5 (b) How many bacteria did we have at the end of 11 hours? (Round down to an integer.) 31 Your last answer was interpreted as follows: 31 (c) How many hours does it take until we are left with a quarter of the bacteria we started with? (Give your answer in exact form.) Check