Mark drives his car along a straight highway. The velocity of his car at time t is given by v(t) = 4.2vt3 + 2t. The velocity is in miles per hour. If he is at mile marker 12 when t = 6 hours, Determine the nearest mile marker at t = 6.5 hours. (A) 34 (В) 46 (C) 51 (D) 62 O A O B O C

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