Amy is at City Hall. She wants to meet Matsu at his ending location from Exercise 29. What is the shortest route she can take if she walks along city streets? Is there more than one possible shortest route?

Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?