What is 5 1/3 + 3 3/4 using LCD (Least Common Denominator) and simplifying it at the same time!

b. f(x) = –√x + 3this is the correct answer

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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my computer is slow i can not see it sorry