The zebra mussel, Dreissena polymorpha, filters particulate organic carbon (POC) from water as part of its feeding pattern. The concentration, c, of POC (in milligrams per liter) remaining ina particular bay m months after the introduction of a population of zebra mussels can be estimated using the following equation.c = 0.4.0.9mAccording to this estimate, how many milligrams per liter of POC were in the bay when the zebra mussels were first introduced?