The position vector of a particle is r(t). Find the requested vector.The velocity at t = 3 for r(t) = (2t2 + 2t + 3)i - 4t3j + (6 - t2)k
A. v(3) = 14i - 108j - 6k
B. v(3) = 10i - 108j - 6k
C. v(3) = 14i + 108j + 6k
D. v(3) = 8i - 36j - 3k
Answer: A
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