Question 1171928
18 liters is approximately 4.5 gallons. This is approximate, since a liter is a little more than a quart, 18 liters is more than 18 quarts, so the actual answer is 4.756 gallons. But they asked for approximate.
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gallons*liters/gallons*ml/liter=ml. Those are the units. Put in the constants
1.5 gallons*3.785/1*1000/1=5677.5 ml