The star polaris is 133 pc from earth and has an apparent magnitude of +2.0. what is the absolute visual magnitude? a. -3.6 b. +3.6 c. 0 d. none of the above a sample of a meteorite has been analyzed, and the result shows that out of every 1000 nuclei of potassium-40 originally in the meteorite, only 250 have not decayed. how old is the meteorite, if the half-life of potassium-40 is 1.25 million years? a)1.25 million years b) 2.50 million years c) 3.75 million years d) 5.00 million years