The position vector of a particle is r(t). Find the requested vector.The velocity at t = 4 for r(t) = (5t2 + 2t + 7)i - 8t3j + (6 - t2)k
A. v(4) = 42i + 384j + 8k
B. v(4) = 38i - 384j - 8k
C. v(4) = 42i - 384j - 8k
D. v(4) = 22i - 128j - 4k
Answer: C
Mathematics
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