Gimagine that at a particular time, a kitchen counter has on it 20 bacteria and that this type of bacteria doubles in number every 15 minutes. the exponential function a ( t ) = 20 e 0.04621 t is a good model for predicting the number of bacteria, a ( t ) , in the population t minutes from some particular start time. how many bacteria could be predicted to be on the counter 2.5 hours later? (round to 2 decimal places.)