9. (12 points) A police car traveling (on Golden West St) north toward the corner of Edinger Ave. & Golden West Street at 60 mph pursues a truck traveling (on Edinger Ave.) east away from the comer of Edinger & Golden West St. at 45 mph. At time t= 0, the police car is 20 miles south and the truck is 25 miles east of the corner of Edinger and Golden West St. Calculate the rate at which the distance between the vehicles is changing at time t = 0. Round the nal answer to three decimal places. (Don't forget to show all 5 steps)