Amy leaves a rest stop at 2 pm traveling west, at 45 miles per hour. sarah leaves 2 hours later, also traveling west, but at 55 miles per hour. at what time will sarah catch up with amy?

Do one of the following, as appropriate: (a) find the critical value z subscript alpha divided by 2 , (b) find the critical value t subscript alpha divided by 2 . 99%; nequals 17; sigma is unknown; population appears to be normally distributed.