A food truck sells 80 hot dogs each day when it charges $4.00 per hot dog. For a $0.20 decrease in price, the food truck sells 5 more hot dogs. A. How much should the food truck charge to maximize daily revenue ?the food truck charges $(blank) per hot dog
B what is the maximum daily revenue? The maximum daily revenue is $(blank)

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step-by-step explanation:

1 number

if we use a graphing calculator, there is only one such number that satisfies the conclusion of the mean value theorem, that is, a number such that

where the right-hand side is the average rate of change of f on the interval [0.5,0.75], which is the slope of the secant line.

in the attached graph, the black line is the secant line which has its slope as the average rate of change of f on [0.5,0.75], while the orange line is the only tangent line to the graph of f in the interval that satisfies the mvt conclusion.