Question

val's whole house central air conditioner uses 2,500 watts when running. Val runs the AC 4 hours per summer day. Electricity costs (10 cents)/(1 kilowatt-hour). How nuch does Val's AC cost to run for a summer month of 30 days?​

Answer 1

9514 1404 393

Answer:

$30

Explanation:

Val's cost is ...

`(2500\text{ W})*\frac{4\text{ h}}{1\text{ da}}\cdot\frac{1\text{ kW}}{1000\text{ W}}\cdot\frac{\$0.10}{1\text{ kWh}}*30\text{ da}\\\\=(2500\cdot4\cdot\$0.10\cdot30)/(1000)=\boxed{\$30}`

It costs Val $30 a month to run her AC.