Question

What is the prescribed dosage of a certain medicine for a child 6 years old, if the adult dosage of the medicine is 180 milligrams?

C= a/((a+12)) ∙ 180
C = child’s dosage in milligrams
a = age of the child
A = adult dosage in milligrams

Answer 1

c+ childs dosage in miligrams

Answer 2

60 milligrams is the right dosage for the child.

Explanation:

The given expression is

`C=(a)/((a+12)) * 180`

Where
`a=6`, because according to the problem, the child is 6 years old.

Replacing and solving, we have

`C=(6)/((6+12) )* 180=(6)/(18 )* 180=60mg`

Therefore, if the adult dosage is 180 milligrams, and the child is 6 years old, the right dosage is 60 milligrams.