code: def num_orifices(FlowPlant, RatioVCOrifice, HeadLossOrifice, DiamOrifice):
      
      #Inputs do not need to be checked here because they are checked by
      #functions this function calls.
      return np.ceil(area_orifice(HeadLossOrifice, RatioVCOrifice,
                                   FlowPlant).magnitude
                      / area_circle(DiamOrifice).magnitude)
docs: Return the number of orifices.