8. Which is an example of a medium of communication? in an office setting
letting people know that Fridays will not have casual dress
a formal speech at a meeting
a person objecting to a point that has been made

The image below shows a common blood pressure gauge. what does this device do? a. measures the level of oxygen present in the blood b. measures the pressure of blood when the lungs expand and compress c. measures the electrical activity of the heart d. measures the pressure of blood when the heart contracts and relaxes