# MAT221.W2.D - In part A we must use Cowlings Rule to...

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In part A, we must use Cowling’s Rule to determine the child sized dose of a medicine. Cowling’s Rule is a formula which converts an adult dose into a child’s dose using the child’s age. As in all literal equations this one has more than one variable, in fact it has three variables. They are: a = child’s age D = adult dose d = child’s dose The formula is d = D ( a + 1 ) 24 I have been assigned to calculate a 11-year-old child’s dose of acetaminophen given that the adult dose is 1000mg. d = D ( a + 1 ) 24 The Cowling’s Rule formula d = 1000 ( 11 + 1 ) 24 I substituted 1,000 for D and 11 for a. Following order of operations, then I added inside parentheses first. d = 1000 ( 12 ) 24 Following order of operations the multiplication comes next. d = 12,000/24 The division is the last step in solving for the child’s dose. d = 500 The result of the division. The proper dose of acetaminophen for a 11-year-old child is 500mg. In part B, we have to determine a child’s age based upon the dose of medicine he has been prescribed.