Solve by graphing. Round each answer to the nearest tenth.

6x^2 + 31x = 12

probability for j is 1/4

while

a is 1/6

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step-by-step explanation:

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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

source: