carol accidentally dropped a container of salt and sodium chloride, into a container of a dark grey metal. carol is pretty sure that the gray metal is iron fillings. using the table above, help carol seperate the two substances

Mike and mitchell decide to have a foot race. they mark off a stretch of 100 yards, and recruit cindy to work the stopwatch. after running the race and looking at the results, cindy declared that mitchell was the fastest. so how did the boys times compare?