The average air pressure exerted by the earth's atmosphere at sea level expressed is 1013.25 millibars, and 29.92 inches of Hg.
What do you mean by Atmosphere?
An atmosphere may be defined as the layers of gases surrounding a planet or other celestial body.
The average pressure at mean sea level in the international standard atmosphere is 1013.25 millibars which is equal to 29.92 inches of mercury (Hg).
Therefore, it is described above.
To learn more about the atmosphere, refer to the link:
https://brainly.com/question/14531632
