Aphone store employee earns a salary of $450 per week plus 10% commission on her weekly sales.
what function rule models the employers weekly earnings?
if the employee earned $570 in a week, what was the amount of her sales for that week?

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.