The new high intensity discharge HID headlights containing xenon gas have an expected life of 1900 hours Because a complete system costs 1000 it is hoped that these lights will last for the life of the car Suppose that the actual life of the lights could be 12 longer or shorter than the advertised expected life Write an inequality that gives the range of life of these new lights Let x be the expected life of the headlights What is the range of the expected life of the headlights hours