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 2 years ago
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 = $ _____
 2 years ago
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 = $ _____

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zepp
 2 years ago
Best ResponseYou've already chosen the best response.31 kilowatt is equal to 1000 watts, can you convert the questions into kW?

Claire4christ
 2 years ago
Best ResponseYou've already chosen the best response.0so we got 4,000 watts

Claire4christ
 2 years ago
Best ResponseYou've already chosen the best response.0and we have to convert them into kw right

zepp
 2 years ago
Best ResponseYou've already chosen the best response.3You are doing this wrong D:\[1\text{kW}=1000\text{W}\\?\text{kW}=4000\text{W}\]

zepp
 2 years ago
Best ResponseYou've already chosen the best response.3Yes! 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?

zepp
 2 years ago
Best ResponseYou've already chosen the best response.340kWh, yes, Tim should pay 4.3 cents per kWh, so how much does he have to pay?

zepp
 2 years ago
Best ResponseYou've already chosen the best response.3Yep, Tim has to pay 172 cents for running that appliance for 10 hours, you got it! :D

zepp
 2 years ago
Best ResponseYou've already chosen the best response.3You have to convert it to $'s though, so 172 cents would be $1.72

Claire4christ
 2 years ago
Best ResponseYou've already chosen the best response.0so its asking round to the nearest cent. 1.7

Chlorophyll
 2 years ago
Best ResponseYou've already chosen the best response.0Round to the nearest CENTs means 2 decimal digits = $1.72

Claire4christ
 2 years ago
Best ResponseYou've already chosen the best response.01 kilowatt=1,000 watts 1,500/1,000=1.5 1.5x10=15 15x4.3=64.5

Claire4christ
 2 years ago
Best ResponseYou've already chosen the best response.0he pays 64.50 right

Chlorophyll
 2 years ago
Best ResponseYou've already chosen the best response.0= 40 w * (4.3 / 1, 000 w hr) * 10 hrs
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