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3 years ago

How much pure acid is in 440 milliliters of a 19% solution

Mathematics

1 answer:

ArbitrLikvidat [17]3 years ago

7 0

Answer:

83.6 mL

Step-by-step explanation:

Given 440 mL of 19% acid solution. This means the whole volume of this acid solution is 100%. Let x mL be the volume of pure acid in this solution.

Then

$440\ mL - 100\%\\ \\x\ mL - 19\%$

Write a proportion:

$\dfrac{440}{x}=\dfrac{100}{19}$

Cross multiply:

$100\cdot x=440\cdot 19\\ \\x=\dfrac{440\cdot 19}{100}\\ \\x=\dfrac{8,360}{100}\\ \\x=83.60\ mL$

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When x=3.5, y=19.25, then the point (3.5,19.25) is vertex of this fourth parabola.

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When x=-1.75, y=-1.125, then the point (-1.75,-1.125) is vertex of this fifth parabola.

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When x=2, y=13, then the point (2,13) is vertex of this sixth parabola.

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