In order to get the most accurate mass measurement, you must __(blank) _. O make sure that you have the right formula to measure its volume
O select the appropriate graduated cylinder and amount of water to measure the displacement
O calibrate your electrqgic balance properly so that it gives you a zero mark when empty
O place one end of your measuring tape at the base of your object

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by  mathematical calculations  before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of  uranus  led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to   spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.