The motion of a dog is observed to be given by the function r = (1.9 m/s²) t²i-[(0.7 m/s³) t³-2.9 m]j. What is the magnitude of the instantaneous velocity of the dog between t=0 and t=3.07 s? 8.12 m/s O 7.48 m/s O24.94 m/s 22.97 m/s
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