According to the information given in the exercise, you need to use a 30 day month and her average monthly electricity usage is:
[tex]975kWh[/tex]Therefore, in order to calcualte her average daily usage, you need to divide her average monthly electricity usage by 30:
[tex]DailyUsage=\frac{975kWh}{30}=32.5kWh[/tex]Knowing that there are 12 months in 1 year, you can find her annual electricity usage as following:
[tex]AnualUsage=(975kWh)(12)=11,700kWh[/tex]The answer is:
[tex]\begin{gathered} DailyUsage=32.5kWh \\ AnualUsage=11,700kWh \end{gathered}[/tex]