An enormous thunderstorm covers Dallas-Ft. Worth. Your best friend Clark is a storm chaser and heads to the center of the storm to take some readings while you stay dry at home. While Clark is at the center of the storm, he sees and hears lightning strike a tree that is 165 m from where he is standing. You are 123 km from the tree. How long does it take for the sound to reach Clark? Assume the speed of sound is 343 m/s.