Perry's Publishing is relocating and 2 employees, Edna and Sam have created a "For sale" sign 4 feet long to place outside the current premises. They plant o attach the sign to a 9-foot pole using a hook and a chain. They would like the top of the sign to be 6 feet high.

How long a chain will Edna and Sam need?

The problem is poorly worded. Why don't you draw a diagram, and tell us what the relevant points of reference are?