My physics HW!! HELP!?

Question

You leave your 50W portable color TV on for 6 hours during the day and evening, and you do not pay attention to the cost of electricity. If the dorm charged you for your electricity use and the cost was $0.1/kW X h, how would be your monthly (30day) bill? Answer in units of dollars.

Answer 1

50W * 6 hours = 300 Watt-hours or 0.3 kWH per day

in a 30 day period, you would consume 0.3 * 30 kWH, or 9 kWH

at $0.10 per kWH, that would equate to $0.90 per month