Look at triangle abc. coordinate grid shows negative 5 to positive 5 on the x axis and y axis at intervals of 1. a triangle abc is shown with a at ordered pair 4, 5, b at ordered pair 2, 1, and c at ordered pair 4, 1. what is the length of side ab of the triangle? 2 square root of 20 6 square root of 38

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.