The JR Iditarod mushers run 75 miles out to the Yentna Station Road House. The starter/timer out at Yentna records the time each of the JR Iditarod mushers checks into the halfway checkpoint.  Your problem is to calculate the time each of the mushers can depart Yentna for the finish line in Willow.  The mushers are required to take a ten-hour layover. To figure the time each musher will depart, add the start differential to the 10-hour layover then add that amount of time to the musher’s Yentna intime.  Create a list of mushers and the time they may depart from Yentna.  List the mushers from the first out to the last out.  Differential – Anna Stephan 14 minutes, Sierra Bobby – 12 minutes, Grace Hill – 10 minutes, Bjorn Keller – 8 minutes, Anna Coke – 6 minutes, Ida Kohnert – 4 minutes, joanna Badalich – 2 minutes and Cassidy Meyer – 0 minutes.  Yentna arrival time – Anna Stephan – 19:20, Ida Kohnert – 19:31, Grace Hill – 19:40, Anna Coke – 19:51, Sierra Bobby – 20:08, Cassidy Meyer – 20:12, Joanna Badalich – 20:25 and Bjorn Keller – 20:32.  

Checking in at Yentna Station Half-way Checkpoint

Answer to Differential

Anna Stephan 14 minutes, Sierra Bobby – 12 minutes, Grace Hill – 10 minutes, Bjorn Keller – 8 minutes, Anna Coke – 6 minutes, Ida Kohnert – 4 minutes, joanna Badalich – 2 minutes and Cassidy Meyer – 0 minutes.