The surface area of a sphere is given by the formula
[tex]SA=4\pi r^2[/tex]where
r=25/2=12.5 in -----> the radius is half the diameter
substitute
[tex]\begin{gathered} SA=4\pi(12.5)^2 \\ SA=625\pi\text{ in}^2\text{ ----> exact value} \end{gathered}[/tex]Find out the approximate surface area
[tex]\begin{gathered} SA=625\pi \\ SA=1,963.50\text{ in}^2\text{ ---> approximate value rounded to two decimal places} \end{gathered}[/tex]