Compare and contrast model A with model C. How are they alike: How are they different? A) They are composed of different elements in the same ratio. B) They are composed of the same elements in different ratios. C) They are composed of different elements in different ratios. D) The are composed of the same elements but the bond types differ. I NEED HELP FAST

You are driving to the grocery store at 20 m/s. you are 110m from an intersection when the traffic light turns red. assume that your reaction time is 0.50s and that your car brakes with constant acceleration. how far are you from the intersection when you begin to apply the brakes? what acceleration will bring you to rest right at the intersection? how long does it take you to stop after the light changes? the known values: vi=20m/s xi=110m t=.50s vf=0m/s xf=0m a=?