The motion of a particle is defined relation. x=t^3-9t^2+24t-8,where x is expressed in meters and t in second. Determine (a) when the velocity is zero ,(b) the position and the total distance traveled when the acceleration is zero

Which of the following is an example of proximodistal pattern of growth? (a) abbey learning to sit first before learning to stand or crawl (b) alex learning to move his eyes before learning his first words (c) colin learning to stare at moving objects before trying to touch them with his hands (d) polly learning to grab the objects with her whole hands before learning to pick them up with her fingers