Your breathing rate is 12 breaths/minute; your tidal volume is 500 mL; your vital capacity is 4700 mL; and your dead air space is 150 mL. Your alveolar ventilation rate is mL/min.

Answer is b and d are the best answersaccording to researchers, this theory is believed to have started 4.6 billion years ago. however much we shed light on theories that took place up to 3 billion years ago, the plate tectonic theory is not suffient enough to explain the earth's and crust formation before 1 to 3 billions years ago through to the earliest formation of planet 4.6 billion years ago. the difference with these numbers are big and it is simply hard to find well-preserved ancient rocks