Correct answer get the brainliest answer!

how much of an 18% solution of sulfuric acid should be added to 360 ml of a 10% solution to obtain a 15% solution?

Here is how I completed the problem:

I started by creating a ratio:



Where 'x' is the desired amount of the 18% solution of sulfuric acid. 

From here, I solved for 'x':









∴You will need to add 1080ml of 18% Sulfuric Acid in order to obtain a 15% solution.

Hello! i hope this
since the cosine is the ratio of the adjacent side to the hypotenuse, you can see that cos 60° = ½. answer. according to the property of cofunctions (topic 3), sin 30° is equal to cos 60°. sin 30° = ½.