Answer:
the awnser is *use googel or a calculator and find the formula its really easy lean it* <3
Explanation:
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The numbers of liters that is needed is 40 liters of 25% solution and 40 liters of 65% solution.
<h3>What is the litters about?</h3>
Note that:
We take x = volume of 25% solution.
We take y = volume of 65% solution.
So, Equation of total volume:
x + y = 80
Hence the equation of amount of acid:
0.25x + 0.65y = 0.45(80)
0.25x + 0.65y = 36
Solve x + y = 80 for x.
x = 80 - y
Then Substitute into the second equation.
0.25(80 - y) + 0.65y = 36
20 - 0.25y + 0.65y = 36
0.4y = 16
y = 40
x + y = 80
x + 40 = 80
x = 40
Therefore, The numbers of liters that is needed is 40 liters of 25% solution and 40 liters of 65% solution.
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It should be noted that when there are two secant segments that intersect each other in a circle, the product of a segment is equal to that of the other segment.
<h3>What is a segment? </h3>
Your information is incomplete. Therefore, an overview of the relationship in a circle will be given. A segment is the set of points that has two end points.
There are two segments that can cross your circle which are the secant segment and the tangent segment.
Another relationship is that according to intersecting chord theorem, when two chords intersect inside a circle, the length of ab will be equal to cd.
Learn more about circles on:
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