The Large Magellanic Cloud is a small galaxy that orbits the
Milky Way. It is currently orbiting the Milky Way at a distance of
roughly 160000 light-years from the galactic center at a velocity
of about 300 km/s.
Use these values in the orbital velocity law to get an estimate
of the Milky Way's mass within 160000 light-years from the center.
(The value you obtain is a fairly rough estimate because the orbit
of the Large Magellanic Cloud is not circular.) Express value using
one significant figure