2. A particle moves along a straight line from the origin (at t = 0) with the given velocity v. Find the distance the particle moves during the interval between the two given times t. (a) v = 4t + 1; 0, 4 (b) v = 6t + 3; 1, 3 (c) v = 3t^2 + 2t; 2, 4

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