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The velocity vector for that particle is given by the vector equation $\vec{v}(t)=\langle 2t^4-3t^3, t+5 \rangle$.

What is the magnitude of the acceleration vector of a particle at $t=1$?

A

$\sqrt{7}$

B

$2$

C

$\sqrt{2}$

D

$-\sqrt{2}$

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