How much #40%# solution and #70%# solution does a scientist need to get #30# liters of #60%# solution?

Answer 1

Scientist needs #10# liters of #40%# solution and #20# liters of #70%# solution to get #30# liters of #60%# solution.

Whenever you have such problems where two mixes with different strengths are to be mixed to get a third mix whose strength is something between the strength of two mixes,

  1. First write the two strengths with space between them (as shown inn figure below.
  2. Then in between write the desired strength.
  3. Write the differences as shown by crossed lines, and
  4. simplify the ratio.
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Answer 2

To get 30 liters of a 60% solution, the scientist needs 12 liters of the 40% solution and 18 liters of the 70% solution.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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