The position vector of a particle is r(t). Find the requested vector.The velocity at t = 4 for r(t) = (3t2 + 4t + 7)i - 4t3j + (8 - t2)k
A. v(4) = 28i + 192j + 8k
B. v(4) = 16i - 64j - 4k
C. v(4) = 20i - 192j - 8k
D. v(4) = 28i - 192j - 8k
Answer: D
Mathematics
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