The amount of seed needed for a landscaper to cover a lawn is shown in the table. Decide if the relationship between the amount of seed and the area it covers is proportional. Lawn Seed 2
Seed ( oz ) / Area covered ( ft )
1 / 27
2 / 54
3 / 81
4 / 108

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.