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Quandaries & Queries
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 Topic: drug
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 Exponential decay 2006-03-29 From Casey:Fifty milligrams of a drug was injected into a patient at 6am. The drug is known to be eliminated according to the law of exponential decay. At 8.30am it was determined that 60% of the drug remained in the body. How many milligrams will remain in the body at midday?Answered by Penny Nom. Prescription drug coverage 2003-12-04 From Khadijah:Last week congressional approval was given to legislation involving prescription drug coverage for seniors. One summary of the legislation explains that it is estimated that in 2006 a senior will pay a premium of \$35 per month, then pay their first \$250 in pharmacy bills. After the bills reach \$250, the coverage would pick up 75% of their bills that bring their total bills between the \$250 and \$2250 mark. After their bills reached a total of \$2250, the senior would be responsible for all bills bringing their total annual bills between \$2250 to \$5100. Then any bills after the \$5100 mark has been reached will be 95% covered by the insurance. Using this information, letís analyze the situation of a senior who accumulates \$6000 in pharmacy bills over one year and has the insurance coverage. Over the course of this year, how many dollars will the senior pay?Answered by Penny Nom. R= 5.3lnx + x. 2003-05-11 From A student:Reaction R to a dose x is given by: R= 5.3lnx + x. For a certain drug, R must not exceed 21. Show that a dose between 8 and 12 units satisfies this requirement & find, correct to 5 decimal places, the greates value of x which satisfies this condition?Answered by Harley Weston. The effectiveness of a drug 2003-04-22 From A student:A certain drug is found to be effective 80% of the time. Find the probability of successful treatment in two out of four cases.Answered by Andrei Volodin.

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