Applying the definition, it is found that at 
, the value of the function is 9.
The definition of the piece-wise function is:
At x = 3, it enters the second definition, thus:
Thus, the value of the function is 9.
A similar problem is given at brainly.com/question/25029892
Solution : Given that, = 0.5 1 - = 0.5 margin of error
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.
Learn more about liters from
brainly.com/question/17435066
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Answer:
D
Explanation:
The answer is : The sacrifices of the soldiers have already made the land sacred.
A is the correct answer because it doesn’t relate to korean war
