Question 954339
8 parts substance A:4 parts substance B =12 total parts 
144 milligrams/12 parts=12 milligrams/part
ANSWER 1:8 parts Substance A(12 milligrams/part)=96 milligrams Substance A.
ANSWER 2:4 parts Substance B(12 milligrams/part)=48 milligrams Substance B.