At a grocery store, apples cost $2 per pound and oranges cost $3.50 per pound. The function representing the total cost, in dollars, for x pounds of apples and x pounds of oranges is f(x) = 5.5x. How does the mathematical domain of the function compare to the reasonable domain? The mathematical domain includes all real numbers, while the reasonable domain includes only whole number values. The mathematical domain includes all real numbers, while the reasonable domain includes only rational values greater than or equal to 0. The mathematical domain includes real numbers greater than or equal to 0, while the reasonable domain includes only whole number values. The mathematical domain includes real numbers greater than or equal to 0, while the reasonable domain includes only rational values greater than or equal to 0.