Question 16, Gen Interest 2.7.54 HW Score: 81.25%, 13 of 16 points Sa x Points: 0 of 1 The average number of vehicles waiting in a line to enter a parking ramp can be modeled by the function x2 f(x) = 5(4- X ) where x is a quantity between 0 and 1 known as the traffic intensity. Find the rate of change of the number of vehicles in line with respect to the traffic intensity for X = 0.4. The rate of change for x = 0.4 is (Simplify your answer. Type an integer or decimal rounded to four decimal places as needed.)