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I need help with this problem please, and please make it legible. The equation r(t) = (31+ 8) i + (Wt) j + (t2) k

I need help with this problem please, and please make it legible.

The equation r(t) = (31+ 8) i + (Wt) j + (t2) k is the position of a particle in space at time to Find the angle between the velocity and acceleration vectors at time t= 0. What is the angle? radians (Type an exact answer, using it as needed.)

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