Calculate the speed with which the moon orbits the earth given the distance from earth to moon as r = 3.84 · 108 m. (astronomers note that the true orbital period of the moon, is 27.3 earth days. interestingly, this would mean that there are approximately 13 months in a year. use the 27.3 days/month for t - the time required for one revolution in your calculation.)

a. 2.78x10^4m/s
b.2.41x10^4m/s
c.2.45x10^4m/s
d.1.02x10^3m/s