The position vector of a particle is r(t). Find the requested vector.The velocity at t = 4 for r(t) = (8t2 + 2t + 9)i - 2t3j + (2 - t2)k
A. v(4) = 62i - 96j - 8k
B. v(4) = 66i - 96j - 8k
C. v(4) = 34i - 32j - 4k
D. v(4) = 66i + 96j + 8k
Answer: B
Mathematics
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%
A. 
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