Find the vertex and the axis of symmetry

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.

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

A10 inch cookie cake is divided into 8 slices. what is the area of 3 slices