An endangered species of fish has a population that is decreasing exponentially The population 6 years ago was 1600. Today, only 900 of the fish are alive. Once the population drops below 100, the situation will be irreversible. When will this happen, according to the model?
a) 23 years from today
b) 25 years from today
c) 22 years from today
d) 24 years from today