A race car, of mass 2500kg, is able to accelerate from rest to a final speed of 25m/s in 3.1s. Ignoring air resistance, determine how much power the engine had to produce to create this acceleration

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