Question Part Points Submissions Used 1 – /1 0/5 Total – /1 On a particular

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Question Part Points Submissions Used 1 –/1 0/5 Total –/1 On a particular day, the following appliances are used for the times indicated: a 1600-W coffee maker, 15 min, and a 1100-W microwave oven, 3.2 min. With these power requirements, find how much it costs to use these appliances at an electrical cost of 7 ¢ per kWh. (Do not round your final answer. Fractional cent values are acceptable.) Question Part Points Submissions Used 1 –/1 0/5 Total –/1 On a particular day, the following appliances are used for the times indicated: a 1600-W coffee maker, 15 min, and a 1100-W microwave oven, 3.2 min. With these power requirements, find how much it costs to use these appliances at an electrical cost of 7 ¢ per kWh. (Do not round your final answer. Fractional cent values are acceptable.) Question Part Points Submissions Used 1 –/1 0/5 Total –/1 Question Part Points Submissions Used 1 –/1 0/5 Total –/1 On a particular day, the following appliances are used for the times indicated: a 1600-W coffee maker, 15 min, and a 1100-W microwave oven, 3.2 min. With these power requirements, find how much it costs to use these appliances at an electrical cost of 7 ¢ per kWh. (Do not round your final answer. Fractional cent values are acceptable.) Question Part Points Submissions Used

Explanation / Answer

1600 watts x 15 min x 1 hr/60 min x 1kw/1000w = 0.399 kW-hour

1100 watts x 3.2 min x 1 hr/60 min x 1kw/1000w = 0.058 kW-hour

total is 0.457 kW-hour

0.457 kW-hour x 7 ¢/kWh = 3.2 ¢

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