3. Blood Pressure. The function P(t)=-40 cos (2nt) + 120 approximates the blood

pressure P in millimeters of mercury at time t in seconds for a person after moderate

exercise.

a) Find the time for one full heartbeat cycle. (This is the period.)

b) Find the number of cycles (heartbeats) per minute.

c)

Graph only one wave of the blood pressure function. (Clearly specify its amplitude,

period, range, max value and min value. Label axes to show 5 equally spaced significant

points including start, middle, and end of wave.)