the comet hale-bopp is 3.75 x 10^10 km away from the sun. how many au away from the sun is it?
5.62 x 10 au
3.75 x 10au
250 au
0.004 au

All of the following statements ere innovations that benefited farmers during the second agricultural revolution expect a. the iron plough b. the railroad c. animal husbandry d. plant domestication