Answer:
316 milliliters of compound A
Explanation:
We know for every 7milliliters, we have 4 milliliters of compound A and 3 milliliters of compound B
So, take 553 divided by 7 = 79
So, take 4 times 79 = 316 milliliters of Compound A
So, 316 milliliters of Compound A are needed!