Acar decelerates such that each second it travels 5% less than the distance it traveled in the previous second. about how far does the car travel in 5 seconds if it is traveling at 30 meters per second during the first second of deceleration?

Case # 51173878 weighs 814 pounds; case # 51173981 weighs 803 pounds; case # 51174058 weighs 817 pounds; case 51174178 weighs 815 pounds; case # 51174248 weighs 817 pounds; case # 51174495 weighs 781 pounds; case # 51174577 weighs 828 pounds. what are the case #'s of the two cases that weigh the same amount?