VA HW: Sections 2.1-2.4 Assignme X + C webassign.net/web/Student/Assignment-Responses/last?dep=29830046 GR BAIH Paused Westside Energy charges its electric customers a base rate of $7.00 per month, plus 10c per kilowatt-hour (kWh) for the first 300 kWh used and 20 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.) if O S x S 300 E(X) = if 300