The data set shows the elevation above sea level of different towns, labeled A-H. Which bar graph represents the data? A 500 E 900
B 650 F 750
C 800 G 800
D 700 H 600

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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

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