A dragster and driver together have mass 905.6 kg . The dragster, starting from rest, attains a speed of 25.5 m/s in 0.53 s. Find the average acceleration of the dragster during this time interval. Answer in units of m/s 2 .

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