Alake with constant volume 10 x100 m is fed by the pollution-free stream with flow rate 70 m/s. a factory dumps 8 m/s of a nonconservative waste with concentration 120 mg/l into the lake. the pollutant has a reaction rate coefficient k of 0.25/day. assuming the pollutant is well mixed in the lake, find the steady-state concentration in the lake

a net is a diagram that shows a “flattened” view of a solid. in a net, each face and base is shown with all of its dimensions. a net can also serve as a pattern to build a three-dimensional solid.

a pyramid is a three-dimensional object with a base that is a polygon and triangular faces that meet at one vertex.

" the net of a triangular pyramid consists of four triangles. the base here we are given of the pyramid is a equilateral   triangle, and the lateral faces are also triangles "