A train is moving with a velocity of 70 km/h. If north is taken as the positive direction, what is the direction of movement of the train?

It is moving north but is speeding up. ,

It is moving north. ,

It is moving south.

It is moving south but is speeding up.

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