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1000C The formula that relates the wattage of an appliance to the cost to run the appliance is W = 1000/tcwhere W is the wattage of appliance, C is the cost to use the appliance per month, t is the time in hours per month, and c is the cost of electricity per kilowatt hour. Use $0.15 per kilowatt-hour for the cost of electricity. How much does it cost to run a 60-watt light bulb 720 hours a month? A. $0.15 B.$6.48 C.$12.32 D.$288

Sagot :

[tex]\begin{gathered} p=\frac{w}{t} \\ \text{cross}-m\text{ultiply} \\ pt=w \\ \text{divide both sides by p} \\ t=\frac{w}{p} \end{gathered}[/tex]

Hence, the correct option is Option C

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