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valina [46]
4 years ago
8

Which is best estimate of each percent? 21/ of 387?

Mathematics
1 answer:
Phoenix [80]4 years ago
3 0
81.27 is the answer to 21% of 387 so a good estimate would be 82
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Maria has added 2 liters of pure alcohol to 8 liters of a 48% alcohol solution. What is the alcohol concentration of the resulti
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Answer:

The alcohol concentration of the resulting solution is 58.4%

Step-by-step explanation:

- At first we must to find the quantity of pure alcohol in the 8 liters

∵ The alcohol concentration is 48% in 8 liters

∴ The quantity of pure alcoholic = \frac{48}{100}*8=3.84 liters

- She added 2 liters pure alcohol to the solution that means the solution

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∴ The quantity of pure alcohol = 2 + 3.84 = 5.84 liters

∴ The resulting solution = 2 + 8 = 10 liters

- Now we need to find the concentration of alcohol in the resulting

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∴ The concentrate of alcohol = \frac{5.84}{10}*100 % = 58.4%

The alcohol concentration of the resulting solution is 58.4%

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\frac{9}{5}  *   \frac{1}{3}         The nine cancels the three and leaves a remainder of three \frac{3}{5}  *   \frac{1}{1} 


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