Answer
Acceleration of the partice at t = 4 is -2
Step-by-step explanation
The acceleration of a particle is the second derivative with respect to time of the particle's position function, that is,
Acceleration = (d²x/dt²)
x (t) = -t² + 13t + 1
(dx/dt) = -2t + 13
(d²x/dt²) = -2
At t = 4,
Acceleration = (d²x/dt²) = -2
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