There are two reaction vessels, one containing A and the other containing B, with equal concentrations at t=0. If both substances decompose by first order kinetics, where kA = 4.70 × 10⁻⁴ s⁻¹ kB = 3.2 × 10⁻³ how much time must pass to reach a condition where [A] = 3.05[B]?