One model of Earth's population growth is P(t)=641+11e−.08t
, where t is measured in years since 1990, and P is measured in billions of people. Which of the following statements are true? Check all that apply.

A. The population of Earth is increasing by a steady rate of 8% per year.

B. The carrying capacity of Earth is 64 billion people.

C. The population of Earth will grow exponentially without bound.

D. In 1990, there were 5.33 billion people.