By subtracting the water poured into the first two beakers from the available water we conclude that the water left for the third beaker is 0.9 liters.
In this question we know that Karen has 3 liters of water and poured 0.7 liters into the first beaker, 1.4 liters into the second beaker and we can determine the water left for the third beaker by subtracted the water poured into the first two beakers from the available water. The available volume is:
V = 3 L - 0.7 L - 1.4 L
V = 0.9 L
By subtracting the water poured into the first two beakers from the available water we conclude that the water left for the third beaker is 0.9 liters.
To learn more on subtractions: https://brainly.com/question/4319655
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