Experiental probability is the correct choice because you will have actual data from an experiment that you are using to create the ratio of outcomes to attempts. This is the scientific and mathematical name for a tested ratio. Theoretical probability, on the other hand, is what you would expect to happen if you were to perform the test.
29 miles because town y is between town x and town z so you can take the distance between town x and town z and subtract the distance from town y to town z
