The reaction between A and B was studied at a fixed temperature, and the initial-rate data are shown below.
Trial [A]₀ (M) [B]₀ (M) Initial rate (M·s⁻¹)
1 0.150 0.200 3.60×10⁻⁴
2 0.300 0.200 7.20×10⁻⁴
3 0.150 0.400 1.44×10⁻³
Determine the complete rate law (including the numerical value and units of the rate constant k) for this reaction.