What is a reasonable rage for this situation?

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.

What is the approximate mark up percentage rate before m equals $1740 marked up from p equals $19,422

The difference between the measures of two complementary angles is 14. find the measure of both angles.