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AP Calculus AB/BC
dF/dD represents the derivative of F(D), which measures how quickly F changes with respect to D. It gives us information about the rate at which fuel decreases as distance increases.
The derivative measures how much a function changes when its input variable changes.
Rate of change describes how much one quantity changes with respect to another quantity.
Implicit differentiation allows us to find derivatives when we have an equation involving both dependent and independent variables.