Find the best solutions to your problems with the help of IDNLearn.com's expert users. Get accurate and detailed answers to your questions from our dedicated community members who are always ready to help.

A formula that approximates the dosage of a drug prescribed for children is shown below. In the​ formula, Aequalsthe ​child's age, in​ years, Dequalsan adult​ dosage, and Cequalsthe proper​ child's dosage. The formula applies for ages 2 through​ 13, inclusive. Use​ Young's rule to find the difference in a​ child's dosage for a 9​-year-old child and a 7​-year-old child. Express the answer as a single rational expression in terms of D. Then describe what your answer means in terms of the variables in the model. ​Young's Rule: Upper C equals StartFraction DA Over Upper A plus 12 EndFraction