How do you put 4.898989 E5 * A. 4.9 x 10^5
B. 4.9 x 10^-5
C. 4 x 10^5
D. 4 x 10^-5

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