SOLUTION: Phil got a shot of penicillin that contained 500mg. The penicillin decayed at a rate of 40%. How much penicillin is left after 4 hours? Write the equation.

Question 737094: Phil got a shot of penicillin that contained 500mg. The penicillin decayed at a rate of 40%. How much penicillin is left after 4 hours? Write the equation.
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Phil got a shot of penicillin that contained 500mg. The penicillin decayed at a rate of 40%. How much penicillin is left after 4 hours? Write the equation.
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40% per what? minute? hour? week?
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If it's 40% per hour 60% remains.

= 64.8 mg
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