import math


def calc_avg_deg_rate(mean_concentration, half_life):
    """ Calculate the average degradation rate of a species over a cell cycle

        Args:
            mean_concentration (:obj:`float`): species mean concentration
            half_life (:obj:`float`): species half life

        Returns:
            :obj:`float`: the average degradation rate of the species
    """
    ave_degradation_rate = math.log(2) / half_life * mean_concentration

    return ave_degradation_rate