A car moves along a circular track of radius such that its speed for a short

A car moves along a circular track of radius ρ such that its speed for a short period of time 0 ≤ t ≤ t₂, is v = b t + c t². Determine the magnitude of its acceleration when t = t₁. How far has it traveled at time t₁? Given:

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p = 250 ft t2 = 4 s b = 3 ft c = 3 ft 3 t1 = 3 s