[tex]\text{Area of a circle =}\pi\times r^2[/tex][tex]\begin{gathered} \text{Difference in areas = Area of Owen's mirror - Area of Emily's mirror} \\ R\text{adius of Owen's mirror=10in } \\ \text{Radius of Emily's mirror = 8in} \\ \pi=3.14 \end{gathered}[/tex][tex]\begin{gathered} \text{Difference in areas = (}3.14x10^2)-(3.14\times8^2) \\ =314-200.96 \\ =113.04in^2 \end{gathered}[/tex]
