Here is the question I need to solve:
The rate constant is given by $\log k = 5.4 - (212/T)$
Calculate the activation energy at $127\ ^\circ\mathrm{C}$.
I know the formula
$$k = A\times e^{-{E_\mathrm{a}/RT}}$$
But, I need to know A (Arrhenius constant) to calculate the required. This value has not been provided in the question. So, what is the method to solve this sort of question?