A is your answer for the Fatima's age one
C is question 1
X = 32 because 100 / 4 is 25, which would make the numerator for x 32
If for without a doubt, 19.2% of the mixture is acid then all you have to do is
376 * 0.192 and that gets you 72.192 ml or in this case 72.2 ml
