You create a plot of voltage (in v) vs. time (in s) for an rc circuit as the capacitor is charging, where v=v_{0} \cdot \left(1- e^{ \frac{-\left(t\right)}{rc} } \right). you curve fit the data using the inverse exponent function y=a \cdot \left(1- e^{-\left(cx\right)} \right)+b and loggerpro gives the following values for a, b, and c. a = 4.211 ± 0.4211 b = 0.1699 ± 0.007211 c = 1.901 ± 0.2051 what is the time constant for and its uncertainty?