If you're meaning to say 7(4) - 5(4), the answer is 28-20= 8
By <em>weighted</em> average, we need 75 liters of 24 % iodine solution and 25 liters of 40 % iodine solution to obtain 100 liters of 28 % iodine solution.
<h3>How to determine the volume associated with a given concentration</h3>
Physically speaking, concentration is equal to the amount of solute divided by the volume of solution. We have two solutions with same solute and different concentration and can find the right proportion between the 24 % solution and the 40 % solution by concept of <em>weighted</em> average:
x · 24 + (1 - x) · 40 = 28
40 - 16 · x = 28
16 · x = 40 - 28
16 · x = 12
x = 3/4
By <em>weighted</em> average, we need 75 liters of 24 % iodine solution and 25 liters of 40 % iodine solution to obtain 100 liters of 28 % iodine solution.
To learn more on weighted average: brainly.com/question/18554478
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Answer:
180-66
114
hope it helps mark as brainlist
Answer:
a is the base
Step-by-step explanation:
its right there
Answer:
It won't let me see the conversion problem. Sorry. I would help if I could.
Step-by-step explanation:
