The total of the monthly payments for a 5-year loan is $10,692. The APR is 7%.
How much money was originally borrowed?
1

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.