Find the derivative of the function for question 10 and 24

\ftell you about und 54. DRUG DOSAGES Thomas Young has suggested the follow- ing rule for calculating the dosage of medicine for chil- dren 1 to 12 years old. If a denotes the adult dosage (in milligrams) and if t is the child's age (in years), then the child's dosage is given by at D (t ) = t+ 12 Suppose the adult dosage of a substance is 500 mg. Find an expression that gives the rate of change of a child's dosage with respect to the child's age. What is the rate of change of a child's dosage with respect to his or her age for a 6-year-old child? A 10-year-old child?