3-lois wants to send a box of orenges to a fiend by mail. the box of orenges cannot exceed a mass of 10 kg. if each orenge has a mass of 200 kg, what is the maximum number she can send?

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.