Each number in a pattern is called a ?

What is the base of 1/9 to the power of 2

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.

Perform the indicated operation. y^2 + 3y - 10 / 3y + 15