So we have five on top and 130 on the bottom. So we have log of this ratio multiplied by this. We plug in our values and we get negative zero point 87 volts or equivalently. If we multiply this by 1000, we get negative 87 millivolts. So we see that this would be our voltage difference, the electric potential difference between the inside and the outside portion of the resting membrane of the neuron. If the permeability of the membrane to sodium was zero, So we know that this is not actually the resting potential, the resting membrane potential, the voltage difference.