0
Anonymous
Convert the seconds to minutes, dividing by 60. Add the 13 minutes, and convert the result to hours, again dividing by 60.
Wiki User
Chat with our AI personalities
6 hours = 2 half lives, thus 25 % would remain. 0.25 x 2 mg = 0.5 mg.Done another way...fraction remaining = 0.5^n where n = number of half lives = 6hr/3hr = 2fraction remaining = 0.5^2 = 0.250.25 x 2 mg = 0.5 mg