Two straight roads intersect at right angles. a car is traveling south toward the intersection while a radar-monitored-speed sign is positioned 14 mile east of the intersection. the speed sign provides both the distance from the sign to an approaching car and the rate at which the distance between the sign and the car is changing. at a certain time, the speed sign shows that the approaching car is exactly 12 mile away from the sign and that the rate at which the car is traveling toward the intersection is 60 miles per hour. which of the following is true about the distance between the car and the intersection at this instant?