C=0.4m+68C, equals, 0, point, 4, m, plus, 68 Lúcia hires a truck driver to deliver the food for her catering company. For a delivery that is mmm miles away, the total cost, CCC, in dollars, is given by the above equation. What is the meaning of the 0.4m0.4m0, point, 4, m in this equation?