A bacteria culture begins with a population of bacteria. After two hours, the population is 900. After four hours, the population is 2,025. This situation can be modeled by the function below.

P(t) = 400(1.5)t

Select all the true statements below.

The growth rate is 150% between consecutive t-values.
The bacteria culture began with a population of 600.
P(t) represents the bacteria population after t days have elapsed.
P(t) represents the bacteria population after t hours have elapsed.
The variable t represents the number of hours elapsed.
The variable t represents the number of days elapsed.
When t = 13, the bacteria culture will have a population of approximately 77,848.