Answer:
$352.80
Step-by-step explanation:
We have been given a family sell back 420 kWh for $0.07 per kWh each month.
First of all, we will find monthly income of family from solar panels by multiplying 420 by $0.07.
[tex]\text{Monthly income of family from solar panels}=420\text{ kWh}\times \frac{\$0.07}{\text{kWh}}[/tex]
[tex]\text{Monthly income of family from solar panels}=420\times\$0.07[/tex]
[tex]\text{Monthly income of family from solar panels}=\$29.40[/tex]
To find the money earned by the family is one year, we will multiply monthly income by 12 as 1 year equals to 12 months.
[tex]\text{Annual income of family from solar panels}=\$29.40\times 12[/tex]
[tex]\text{Annual income of family from solar panels}=\$352.80[/tex]
Therefore, the family could make $352.80 in a year from solar panels.
