nothanku69 nothanku69 19-12-2020 Mathematics contestada 4. A particle moves along the x-axis so that its position at any time is given by x(t) = 3t2 – 20t for t > 0. For which of the following values of t is the speed the greatest? (A) t = 1 (B) t = 2 (C) t = 3 (D) t = 4