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Claire4christ Group Title

Can someone help me with this problem please. Tim's electricity costs 4.3 ¢ a kilowatt hour. How much will it cost to run the following appliances for 10 hours? (round to the nearest cent) a) a Dryer @ 4,000 watts. Cost = $ ___ b) a Heater @ 1,500 watts. Cost = $ __ c) a Radio @ 40 watts. Cost = $ _____

  • one year ago
  • one year ago

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  1. Claire4christ Group Title
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    @Chlorophyll

    • one year ago
  2. Claire4christ Group Title
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    @zepp

    • one year ago
  3. zepp Group Title
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    1 kilowatt is equal to 1000 watts, can you convert the questions into kW?

    • one year ago
  4. Claire4christ Group Title
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    so we got 4,000 watts

    • one year ago
  5. Claire4christ Group Title
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    and we have to convert them into kw right

    • one year ago
  6. zepp Group Title
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    Yes

    • one year ago
  7. Claire4christ Group Title
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    4,000x1,000

    • one year ago
  8. Claire4christ Group Title
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    0,004 killowatts

    • one year ago
  9. zepp Group Title
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    You are doing this wrong D:\[1\text{kW}=1000\text{W}\\?\text{kW}=4000\text{W}\]

    • one year ago
  10. Claire4christ Group Title
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    4

    • one year ago
  11. Claire4christ Group Title
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    killowatt

    • one year ago
  12. zepp Group Title
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    Yes! Now, this appliance is rated at 4kW, using it for an hour would use 4kWh, how much would it use if it was operating for 10 hours?

    • one year ago
  13. Claire4christ Group Title
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    40

    • one year ago
  14. Claire4christ Group Title
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    400

    • one year ago
  15. Claire4christ Group Title
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    4x10

    • one year ago
  16. zepp Group Title
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    40kWh, yes, Tim should pay 4.3 cents per kWh, so how much does he have to pay?

    • one year ago
  17. Claire4christ Group Title
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    40x4.3

    • one year ago
  18. Claire4christ Group Title
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    172

    • one year ago
  19. zepp Group Title
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    Yep, Tim has to pay 172 cents for running that appliance for 10 hours, you got it! :D

    • one year ago
  20. zepp Group Title
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    You have to convert it to $'s though, so 172 cents would be $1.72

    • one year ago
  21. Claire4christ Group Title
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    so its asking round to the nearest cent. 1.7

    • one year ago
  22. zepp Group Title
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    Yes, you got it :)

    • one year ago
  23. Chlorophyll Group Title
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    Round to the nearest CENTs means 2 decimal digits = $1.72

    • one year ago
  24. Claire4christ Group Title
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    1 kilowatt=1,000 watts 1,500/1,000=1.5 1.5x10=15 15x4.3=64.5

    • one year ago
  25. Claire4christ Group Title
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    he pays 64.50 right

    • one year ago
  26. Chlorophyll Group Title
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    Yes, $64.50

    • one year ago
  27. Chlorophyll Group Title
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    = 40 w * (4.3 / 1, 000 w hr) * 10 hrs

    • one year ago
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