brainlist for comeing to this question but you have to be smart or you have to get my question 5.I have two question what do you do and what the different from premeter and area and what the different from inch and inch 2

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:  

c. he organized a political resistance group based on islam.