In triangle ABC, m BC = 8. How many triangles could have
these side lengths and angle measures?
A no triangle Ctwo triangles
B one triangle D more than two
triangles

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.