Answer 1_3_6

  1. Convert the watts into kilowatts:  300 W = 0.3 kW
  2. The time is in hours = 4.5 h
  3. The units used = 0.3 kW × 4.5 h = 1.35 kWh
  4. Cost = 1.35 kWh × 8 p = 10.8 p

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