A population of bacteria is treated with an antibiotic. It is estimated that 5,000 live bacteria existed in the sample before treatment. After each day of treatment, 40% of the

sample remains alive. What is f(7) and what does it mean?

a) After 8.192 days, the population of the bacteria will be 7.
b) After one week the population of the bacteria will be 8.192.
c) That 40% of the bacteria will be 7.
d) That the bacteria has a population of 5,000.

a) After 8.192 days, the population of the bacteria will be 7.

f(7) means that after 7 days of treatment, only 7 bacteria will be alive in the sample out of the original 5,000.