Question

madsen energy and spora electric are two utility companies operating in percy’s state. each company charges its residential customers a constant rate per kilowatt-hour of electricity. madsen energy charges $4.50 for every 30 kilowatt-hours of electricity. this table shows how much spora electric charges:
spora electric
electricity (kilowatt-hours) | charge
150 | $18.00
195 | $23.40
240 | $28.80
which company charges residents less per kilowatt-hour of electricity?
madsen energy spora electric
how much less does that company charge per kilowatt hour?
$ less

Explanation:

Step1: Calculate Madsen's rate

Madsen charges $4.50 for 30 kWh. Rate = $\frac{4.50}{30}$ = $0.15 per kWh.

Step2: Calculate Spora's rate

Using first row: 150 kWh for $18.00. Rate = $\frac{18.00}{150}$ = $0.12 per kWh.

Step3: Compare rates

0.12 < 0.15, so Spora is cheaper. Difference: 0.15 - 0.12 = $0.03.

Answer:

Spora Electric charges less. The difference is $0.03 per kilowatt - hour.