Which set of data has the same mode and median? 3, 4, 6, 7, 8 3, 3, 4, 5, 5 6, 7, 7, 8, 9 2, 2, 3, 4, 6

ending amount = beginning amount / (2^n)

where "n" = number of half-lives (or elapsed time / half-life)

ending amount = 50 mg / (2 ^10 / 5.3)

ending amount = 50 mg / (2 ^ 1.8867924528)

ending amount = 50 m / 3.6981210597

ending amount = 13.5203794557 mg

or about 13.5 mg remain

source:  

the answer to this is 4340

hope this if needed hmu