you ever stared into an orchard as you passed it on the road? From one
perspective, you see that the trees are planted in straight rows. But as you
move to a different spot, all you see is a mass of trees.
main characters of this unit, Madie and Clyde, have planted an orchard. They
want to know how long it will take before they can no longer see from the
center of the orchard to the outside world.
begin this unit with a look at their overall problem, and then you’ll examine
some simpler cases.