batteries are rated in terms of ampere-hours (a ? h). for example, a battery that can produce a current of 2.00 a for 3.00 h is rated at 6.00 a ? h. (a) what is the total energy, in kilowatt-hours, stored in a 12.0-v battery rated at 55.0 a ? h? (b) at $0.110 per kilowatt-hour, what is the value of the electricity produced by this battery?