Question

If I leave the 100 watt bulb on for a week (7 days, 24 hours a day) how much would it cost me? 1.0KWII costs S0.16. (1 pt) PE

Answer 1

A week has a total of:

$(7)(24)=168\text{ }$

hours. This means that we we use a total of:

$(168)(100)=16800\text{ W}=16.8\times10^3=16.8\text{ KWH}$

Then we spend:

$16.8(0.16)=2.69$

Therefore, it will cost $2.69