They each started at the point (-2,5) and moved 3 units vertically in the plane. Identify one of the two sets of coordinates that they arrived at.

The coverage of a base station of a telecommunication company forms a disk with a radius of (kilometers). let be the distance of a cellphone from a base station. assume that the location of cellphones in use are randomly uniformly distributed within the disk. calculate the mean and variance for the random variable.