Here is how I completed the problem:
I started by creating a ratio:
![\frac{x}{0.18} + \frac{360}{0.10} = \frac{x+360}{0.15}](https://tex.z-dn.net/?f=%20%5Cfrac%7Bx%7D%7B0.18%7D%20%2B%20%5Cfrac%7B360%7D%7B0.10%7D%20%3D%20%5Cfrac%7Bx%2B360%7D%7B0.15%7D)
<em>Where 'x' is the desired amount of the 18% solution of sulfuric acid.
</em>From here, I solved for 'x':
<em>
</em>
![\frac{0.10x}{0.018} + \frac{360(0.18)}{0.018} = \frac{x+360}{0.15}](https://tex.z-dn.net/?f=%20%5Cfrac%7B0.10x%7D%7B0.018%7D%20%2B%20%5Cfrac%7B360%280.18%29%7D%7B0.018%7D%20%3D%20%5Cfrac%7Bx%2B360%7D%7B0.15%7D%20)
![\frac{0.10x}{0.018} + \frac{64.8}{0.018} = \frac{x+360}{0.15}](https://tex.z-dn.net/?f=%20%5Cfrac%7B0.10x%7D%7B0.018%7D%20%2B%20%5Cfrac%7B64.8%7D%7B0.018%7D%20%3D%20%5Cfrac%7Bx%2B360%7D%7B0.15%7D%20)
![\frac{0.10x+64.8}{0.018} = \frac{x+360}{0.15}](https://tex.z-dn.net/?f=%20%5Cfrac%7B0.10x%2B64.8%7D%7B0.018%7D%20%3D%20%5Cfrac%7Bx%2B360%7D%7B0.15%7D%20)
![0.15(0.10x+64.8) = 0.018(x+360)](https://tex.z-dn.net/?f=0.15%280.10x%2B64.8%29%20%3D%200.018%28x%2B360%29)
![0.015x+9.72 = 0.018x+6.48](https://tex.z-dn.net/?f=0.015x%2B9.72%20%3D%200.018x%2B6.48)
![0.003x = 3.24](https://tex.z-dn.net/?f=0.003x%20%3D%203.24)
![x = 1080](https://tex.z-dn.net/?f=x%20%3D%201080)
∴You will need to add 1080ml of 18% Sulfuric Acid in order to obtain a 15% solution.
The answer is b, -11.
plug in 3 as the input and solve.
Answer:
208°
Step-by-step explanation: