Answer:
The cost of electric energy, per week, is $3.15
Explanation:
Given that,
Power = 60 W
Time = 10 hours
Cost of electric energy = $ 0.75
We need to calculate the energy
Using formula of energy
[tex]E=Pt[/tex]
Where, P = power
t = times
Put the value into the formula
[tex]E=60\times10[/tex]
[tex]E=600\ Wh[/tex]
[tex]E=0.6\ kw h[/tex]
We need to calculate the energy consume in a week
Using formula of energy
[tex]E'=0.6\times7[/tex]
[tex]E'=4.2\ kwh[/tex]
We need to calculate the cost of electric energy, per week,
Using energy for cost
[tex]Cost\ of\ 1\ kWh=\$0.75[/tex]
[tex]Cost\ of\ 4,2\ kwh=4.2\times0.75[/tex]
[tex]Cost\ of\ electric\ energy=$ 3.15[/tex]
Hence, The cost of electric energy, per week, is $3.15