05-22-2009, 08:00 AM
A dilute disinfectant kills 90% of a bacterial inoculum in 10 minutes. Which of the following is the shortest amount of time (in minutes) required to reduce an inoculum of 10° bacteria to less than 10 bacteria?
A) 10
B) 50
C) 100
D) 140
E) 180
A) 10
B) 50
C) 100
D) 140
E) 180