The total cost c(x), in dollars, for renting a car for a day and driving it x miles is shown: c(x) = 75 + 0.55x What does c(20) represent?
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The number of dollars it costs to drive the car 20 miles.
The number of miles driven for a cost of $20.
The number of miles driven on the car in 20 days.
The number of dollars spent to rent the car for 20 days.