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1 kilowatt is equal to 1000 watts, can you convert the questions into kW?

so we got 4,000 watts

and we have to convert them into kw right

Yes

4,000x1,000

0,004 killowatts

You are doing this wrong D:\[1\text{kW}=1000\text{W}\\?\text{kW}=4000\text{W}\]

killowatt

40

400

4x10

40kWh, yes, Tim should pay 4.3 cents per kWh, so how much does he have to pay?

40x4.3

172

Yep, Tim has to pay 172 cents for running that appliance for 10 hours, you got it! :D

You have to convert it to $'s though, so 172 cents would be $1.72

so its asking round to the nearest cent. 1.7

Yes, you got it :)

Round to the nearest CENTs means 2 decimal digits
= $1.72

1 kilowatt=1,000 watts
1,500/1,000=1.5
1.5x10=15
15x4.3=64.5

he pays 64.50 right

Yes, $64.50

= 40 w * (4.3 / 1, 000 w hr) * 10 hrs