The two equilateral triangles below are similar figures. What is the scale factor from the small triangle on the left to the large triangle on the right? The triangles are not drawn to scale.

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.