The position vector of a particle is r(t). Find the requested vector.The velocity at t = 2 for r(t) = (4 - 5t2)i + (4t + 9)j - e-2tk
A. v(2) = -20i + 4j - 2e-4k
B. v(2) = -10i +4j + 2e-4k
C. v(2) = 20i + 4j + 2e-4k
D. v(2) = -20i + 4j + 2e-4k
Answer: D
Mathematics
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