The microbe concentration blx), in appropriate units, of a certain lake depends approximately on the oxygen concentration x, again in appropriate units, according to the following function. answer parts (a) and (b). b)-13-120x+ 1958: (0sxs 20) (a) find the oxygen concentration that will lead to the minimum microbe concentration in appropriate units.

This is a form of winter precipitation. it is frozen precipitation falling as ice pellets. snowflakes melt into raindrops as they pass through a thin layer of warmer air. the raindrops then refreeze into particles of ice when they fall into a layer of sub-freezing air near the surface of the earth. this precipitation is called a) hail. b) rain. c) sleet. d) snow.