7.0258 daL is the answer daL stands for deka liters
4.4 x 10^-4
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An easy way to think of independent and dependent variables is, when you're conducting an experiment, the independent variable is what you change, and the dependent variable is what changes because of that. You can also think of the independent variable as the cause and the dependent variable as the effect.
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The answer is the 2nd choice, number of sales.
The function described f(x) = B + Cx