X Your answer is incorrect. The average adult takes about 12 breaths per minute. As a patient inhales, the volume of air in the lung increases. As the patient exhales, the volume of air in the lung decreases. For t in seconds since start of the breathing cycle, the volume of air inhaled or exhaled since t = 0 is given, in hundreds of cubic centimeters, by A(t) = - 2cos 5- 1 ) + 2 . (a) How long is one breathing cycle? 0 seconds (b) Find A' (2) and explain what it means. Round your answer to three decimal places. A' (2) ~ i 1.176 hundred cubic centimeters/second. [A'(2)| seconds after the cycle begins, the patient is exhaling at a rate of approximately two hundred cubic centimeters/second. +