EXPLANATION:
We are given the following details;
A solution is 338 millimeters and is made up of acid and water.
The acid content of this solution is 12.9% of the total.
We are required to find the acid content in millimeters.
To do that, we would take the following steps;
[tex]12.9\%\text{ of }338=\frac{12.9}{100}*\frac{338}{1}[/tex][tex]\begin{gathered} \frac{12.9}{100}*\frac{338}{1} \\ =0.129*338 \\ =43.602 \end{gathered}[/tex]
ANSWER:
12.9% acid solution would equal 43.602 millimeters.
Rounded to the nearest tenth would now give us;
43.6 millimeters.
