Which of the following are examples of exponential decay? select all that apply. a) the population of florida is increasing by 43% each year b) the pesticide ddt has a half-life of 15 years c)march madness has 64 teams in the bracket. each round, half of the teams are eliminated d)after an antibiotic is added to a culture of bacteria, the number of bacteria is reduced by half every three hours e) a tree frog population doubles every three weeks