What is the coefficient of the x9y-term in the binomial expansion of (2y + 4x3)4?

Why are all maps distorted? when reading a map, why is it important to check the legend? what is the difference between longitude and latitude? identify the meridian at 0° longitude and the parallel at 0° latitude.

Both pictures below were taken at the same time of day, but one picture was taken in summer, and the other in winter. how can you tell which is in winter

The picture above depicts the berlin wall which divided in half from the 1960 to 1989 which type of boundary was the berlin wall