Deanna and Raquel ride a merry-go-round together. Deanna sits on a horse on the outer edge of the merry-go-round, 10 feet from the center of the ride. Raquel sits on a horse that is 2 feet closer to the center than Deanna. This ride makes one full rotation every 15 seconds. When the ride starts spinning, which girl is traveling faster? Explain how you know.