I need help with chem 4 hw problem

The reaction 2A + B –> C + D has an activation energy of 80.0 kJ/mol. At 320°C, the rate constant k = 1.80 x 10-2 L mol-1 s-1. What would be the value of k at 450°C? I know what the answer is but I’m not sure how it’s the right answer.