A family has a huge array of solar panels to make electricity. If each month they sell back 420 kWh for $0.07 per kWh, how much money could they make in a year

Answer:$352.80Step-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.