Answer
$P=1.3 W$
Work Step by Step
To find the power, use the equation relating power, distance, and intensity, which is $$I=\frac{P}{A}=\frac{P}{4\pi R^2}$$ Solving for P yields $$P=4\pi R^2 I$$ Substituting values of $R=10\times 10^3m$ and $I=10\times 10^{-6}W/m^2$ yields $$P=4\pi(10\times 10^3m)^2(10\times 10^{-6}W/m^2)$$ $$P=1.3 W$$
