What is the only possible value of mℓ for an electron in an s orbital?Westside Energy charges its electric customers a base rate of $2.00 per month, plus 11¢ per kilowatt-hour (kWh) for the first 300 kWh used and 4¢ per kWh for all usage over 300 kWh. Suppose a customer uses x kWh of electricity in one month.
(a) Express the monthly cost E as a piecewise defined function of x. (Assume E is measured in dollars.)