Question: The horizontal surface area As (m2) of a lake at a particular depth can be computed from volume by differentiation, Where V= volume (m3) and

The horizontal surface area As (m2) of a lake at a particular depth can be computed from volume by differentiation,

Where V= volume (m3) and z = depth (m) as measured from the surface down to the bottom. The average concentration of a substance that varies with depth c (g/m3) can be computed by integration

The horizontal surface area As (m2) of a lake at

Where Z = the total depth (m). Determine the average concentration based on the followingdata.

AP A, (z) = -(z) dz

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