If a number and a variable are together with no sign between them, what operation does that show?

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

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.

What is the hypotenuse of a triangle with 4 ft and 5 ft