I want to get a hold of someone that can refund a charge to an account I have already canceled

Which amusement park ride utilizes periodic motion a.slide b.bumper cars c.giant swing d.roller coaster

The use of a beat or a rhythm to remember something is

When must a driver yield to a pedestrian? a. only when the pedestrian is in the roadway b. only when the pedestrian is in a designated crosswalk c. only when the pedestrian has a walk signal d. always