How many ml of 1:4 solution and how many ml of sterile water are needed to prepare 600 ml of 1:20 solution ?
Answers
Answer:
Approximately 143 mL of 1:4 solution and 457 mL of water
Step-by-step explanation:
A 1:4 solution has a concentration of 1/(1+4) = 1/5 or 20%.
Similarly, a 1:20 solution has a concentration of 1/(1+20) = 1/21 or 4.76%.
If x is the mL of 20% solution and y is the mL of water, then:
x + y = 600
1/5 x = 1/21 (600)
Solve:
x = 5/21 (600)
x ≈ 143
y ≈ 457
You need approximately 143 mL of 1:4 solution and 457 mL of water.
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Answer:
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Step-by-step explanation:
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Cost of each eraser = 15 cents
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Answer:
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Step-by-step explanation:
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In this case it is observed that when the years increase the population decreases. Therefore it is a negative relationship. The distribution of the points resemble moderately to a straight line. Therefore, the correct option is "moderate negative"
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B.{5,3.5,0,-0.4,-1}
C.{-1,-0.4,5,0,3.5}
D.{-1,-0.4,0,3.5,5}
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