L The cost of a trip that is L miles long, driving a car that gets m miles per gallon, with gas costs of $p/gal is C = _p dollars. Suppose you plan a trip of L = 1500 mi in a m car that gets m = 31 mi/gal, with gas costs of p = $3.70/gal. Complete parts (a) through (d). a. Explain how the cost function is derived. What is the general cost for the car traveling 1 mile? Type the answer using the symbols L, p, and m as needed. The cost for 1 mile is D