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Calculate the instantaneous velocity for the given value of t of an object moving with rectilinear motion according to the given function relatings s (in

Calculate the instantaneous velocity for the given value of t of an object moving with rectilinear motion according to the given function relatings s (in feet) and t (in seconds).

s=4t^3-4t^2+15; t=4

s=t^2+3t; t=5

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