The velocity v of blood at a valve in the heart of a certain animal is modeled by the equation v= -2 cos (5xt) + 2, where v is in centimeters per second and t is time in seconds. a. What are the maximum and minimum velocities of the blood at this valve? b. What is the animal's heart rate in beats per minute? a. The maximum velocity of the blood at this valve is cm/sec and the minimum velocity of the blood at this valve is cm/sec. b. The animal's heart rate in beats per minute is

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