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A certain drug leaves the bloodstream at a rate of 22% per hour. If you are given an initial dose of 20 mg, how long until there are 10 mg in your bloodstreams??
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A certain drug leaves the bloodstream at a rate of 22% per hour. If you are given an initial dose of 20 mg, how long until there are 10 mg in your bloodstreams??

User Jthill
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you want to turn that 22% into a 50% since its half...
I take 50 and divide it by 22, and get 2.27.....
so then multiply 0.27 by 60 minutes
get about maybe 2 hours and 16 minutes......
User Eric Barr
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