SOLUTION: Cowling’s rule is another method for determining the dosage of a drug to prescribe to a child. For this rule, the formula d=D(a+1)/24 gives

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Question 391130: Cowling’s rule is another method for determining the dosage of a drug to prescribe to a child. For this rule, the formula
d=D(a+1)/24
gives the child’s dosage d, where D is the adult dosage and a is the age of the child in years. If the adult dosage of a drug is 600 milligrams and a doctor uses this formula to determine that a child’s dosage is 200 milligrams, then how old is the child?
Answer by mananth(16946) About Me  (Show Source):
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Cowling’s rule is another method for determining the dosage of a drug to prescribe to a child. For this rule, the formula
d=D(a+1)/24
gives the child’s dosage d, where D is the adult dosage and a is the age of the child in years. If the adult dosage of a drug is 600 milligrams and a doctor uses this formula to determine that a child’s dosage is 200 milligrams, then how old is the child?
...
d=D(a+1)/24
D= 600
d=200
a=?
200=600(a+1)/24
%28200%2A24%29%2F600+=+a%2B1
=8=a%2B1
a=8-1
a=7 the child's age
...
m.ananth@hotmail.ca