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If a laptop uses $60\text{ W}$ of electricity and is plugged in for eight hours per day, it will use approximately $480\text{ Wh}$ per day.

$${ 60\text{ W} } \times \cfrac { 8\text{ h} }{1\text{ day} } = 480\text{ Wh per day}$$

If electricity costs $ \$0.10 \text{ per kWh}$, how much will it cost to charge this laptop each year?

Note: Try this calculation without a calculator. Write down all your work.

A

$ \$172,800.00$

B

$ \$480.00$

C

$ \$ 17$

D

$ \$ 172$

E

$ \$4.80$

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