from sea level, the biosphere goes up 9km and down about 19km. What is the thickness of the biosphere in meters.

The thickness of the biosphere from the sea level is 28,000 meters.
The biosphere is the part of the earth's ecosystem comprised of living and non-living organisms. It is the thin layer of the surface of the earth where life exists. It includes the fauna, flora, human beings, and microorganisms.
Given values:
Thickness above sea level (in metres)= 9,000 (9 km X 1,000 metres)
Thickness down sea level (in metres) = 19,000 (19 km X 1,000 metres)
Computation of the thickness of the biosphere:
[tex]\rm \ Thickness \rm\ of \rm\ biosphere=\rm\ Thickness \rm\ above \rm\ sea \rm\ level + \rm\ Thickness \rm\ down \rm \ sea \rm\ level\\\rm \ Thickness \rm\ of \rm\ biosphere= 9,000\ meters + 19,000\ meters\\ \rm \ Thickness \rm\ of \rm\ biosphere= 28,000\ meters[/tex]
Therefore, the biosphere's thickness in terms of meters is 28,000.
Learn more about the biosphere in the below-mentioned link:
https://brainly.com/question/2272996