(1 point) A car's position at time t is given by 50') = 5.51'2 + 631', where s is measured in feet and t is measured in seconds. What is the velocity of the car at time t? U(t) = feet/second What is the acceleration of the car at time t? a(t) = eet/second2 At what time does the car stop? 1' = seconds When the car stops, what is its position? 3 2 feet