What happens to the blood that reaches the lungs from the pulmonary artery?
picks up co2 and releases o2
picks up co2 and o2
picks up o2 and releases co2
releases o2 and co2

picks up O2 and releases CO2

Explanation:

The pulmonary artery represents a structure within pulmonary circulation that is responsible for carrying deoxygenated blood to the lung.

When blood from the pulmonary artery reaches the long, it becomes oxygenated an in return, the CO2 it carries is released into the lung in a process otherwise known as gaseous exchange.

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.