If a person walks 3 blocks East, turns and walks 5 blocks north. The person then turns and walks 3 blocks west and then 5 blocks south. What is the total distance the person travels?

An electric power distributor charges residential customers $0.10 per kilowatt-hour (kwh). the company advertises that "green power" is available in 150 kwh blocks for an additional $4 per month. (green power is generated from solar, wind power, and methane sources.) if a certain customer uses an average of 391 kwh per month and commits to one monthly 150 kwh block of green power, what is her annual power bill