Amarble slides along a frictionless track at a constant speed before encountering a section of the track that is covered with a thin layer of putty. the instantaneous velocity of the marble as it slides past the putty, as a function of time is given by =−+ where =0 at the moment when the marble first comes into contact with the putty. as the marble exits the region covered in putty, the marble's instantaneous acceleration goes to zero. for =2.50 m/s, =2.95m/s2, and c=7.30m/s4, calculate the length δx of the track that is covered with putty.