Dr. Giarusso's Problem:

One ship was sailing south at a rate of 6 miles per hour; another east at the rate of 8 miles per hour. At 4 pm the second crossed the track of the first where the first was 2 hours before.

1. How was the distance between the ships changing at 3 pm?
2. How at 5 pm?
3. When was the distance between them not changing?

Due Friday, September 10^th at Noon.