Round up concentrate Grass and Weed killer consists of an 18 % active ingredient  glyphosate(and 82% inactive ingredients).The concentrtae is to be mixed to water and applied to weeds.If the final mixture is to contain 0.9% active ingredient ,how much concentrate and how much water should be mixed to make 200 gallons of the final mixture?

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Asked Mar 7, 2019
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Round up concentrate Grass and Weed killer consists of an 18 % active ingredient  glyphosate(and 82% inactive ingredients).The concentrtae is to be mixed to water and applied to weeds.If the final mixture is to contain 0.9% active ingredient ,how much concentrate and how much water should be mixed to make 200 gallons of the final mixture? 

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Expert Answer

Step 1

The concentrate consists 18% active ingredients and 82% inactive ingredients.

While the concentrate mixed with the water, the final mixture contains 0.9% active ingredient.

We have to make 200 gallons of final mixture.

Step 2

The active ingredient decreases from 18% to 0.9%.

That is, the decrease level is,

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Step 3

Since the active ingredients decreases at the rate of 5, inactive ingredients also...

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