Solve.Nurses use a formula known as Young's rule to determine the amount of medicine to give a child under 12 years of age when the adult dosage is known: 
where C is the child's dose, A is the age of the child in years, and D is the adult dose. (a) Work backward and find the adult dose in terms of the child's dose. Solve for D. (b) Find D if C = 0.12 gram and A = 4.
A. (a) D = 
,
(b) 0.48 gram
B. (a) D = 
,
(b) 0.52 gram
C. (a) D = 
,
(b) 0.52 gram
D. (a) D = 
,
(b) 0.48 gram
Answer: D
Mathematics
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