The formula for the surface area of a sphere is $4\pi r^2$, where $r$ is the radius of the sphere. In this case, the radius of the Sun is given as $6.96 \times 10^{8} \mathrm{m}$. So, the surface area of the Sun is:
\[A = 4\pi (6.96 \times 10^{8})^2\]
Show more…