A car leaves an intersection traveling west. Its position 5 sec later is 30 ft from the intersection. At the same time, another car leaves the same intersection heading north so that its position t sec later is y = t + 4t ft from the intersection. If the speed of the first car 5 sec after leaving the intersection is 11 ft/sec, find the rate at which the distance between the two cars is changing at that instant of time. (Round your answer to two decimal places.) ---Select---