final6
Two shoppers spot the last flat screen tv at the same time, on Black Friday. Shopper A starts 90ft east of the tv and for the first 8 seconds runs towards the tv at 8ft/sec, but then suddenly she is struck asthma as has to slow down to 2ft/sec for the rest of the sprint. Shopper B starts 80ft north of the tv and starts running towards it at 10ft/sec, but after 6sec she trips and falls, with an unfaltering devotion to getting the tv she continues on, crawling at 1ft/sec. At what rate is the distance between the two shoppers changing at 5sec, 7sec, and 8.25sec?