The Moon Orbits Earth in an Average of 27 $\frac{4 \pi^{2}}{G\left(M_{1}+M_{2}\right)}$

Essay

The Moon orbits Earth in an average of 27.3 days at an average distance of 384,000 kilometers.Using Newton's version of Kepler's third law
p² = $\frac{4 \pi^{2}}{G\left(M_{1}+M_{2}\right)}$ a³ determine the mass of Earth.You may neglect the mass of the Moon in comparison to the mass of Earth.