In general, Single celled organisms that use false arms to move cannot survive in dry environments, Such as deserts why My teacher gave us this question along with 20 others and we just started the subject and its due today this is the only question I don't know

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=?