The average adult takes about12 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. Fort in seconds since start of the breathing cycle, the volume of air inhaled or exhaled sincet=0 is given,¹in hundreds of cubic centimeters, by

A(t)=-2cos((2/5)t)+2

(a)How long is one breathing cycle?

____________seconds

(b)FindA(8) and explain what it means.

Round your answer to three decimal places.

A(8) ___________________ hundred cubic centimeters/second.

explain ______________