In the problem involving days, a 365−day year is assumed.
Electricity rates. The table shows the electricity rates charged by Easton Utilities in the summer months.
(A) Write a piecewise definition of the monthly charge S(x) (in dollars) for a customer who uses x kWh in a summer month.
(B) Graph S(x).
Energy Charge (June–September)
$3.00 for the first 20 kWh or less |
5.70¢ per kWh for the next 180 kWh |
3.46¢ per kWh for the next 800 kWh |
2.17¢ per kWh for all over 1,000 kWh |
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