Write a real-world word problem that can be solved by adding 1.99 and 2.49

In the diagram of circle a what is m

What are two numbers that have a sum of 15?

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.