An insecticide label specifies a dilution of 1 1/2 teaspoons per gallon of water. How much insecticide should be added to a half gallon of water?

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Multiple Choice

An insecticide label specifies a dilution of 1 1/2 teaspoons per gallon of water. How much insecticide should be added to a half gallon of water?

Explanation:
To keep the same concentration, the amount of insecticide scales with the amount of water. Half a gallon is half of a gallon, so use half as much insecticide as called for in a full gallon. 1 1/2 teaspoons per gallon times 1/2 equals 3/4 teaspoon. So add 3/4 teaspoon to half a gallon of water.

To keep the same concentration, the amount of insecticide scales with the amount of water. Half a gallon is half of a gallon, so use half as much insecticide as called for in a full gallon. 1 1/2 teaspoons per gallon times 1/2 equals 3/4 teaspoon. So add 3/4 teaspoon to half a gallon of water.

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