Angela makes custom picture frames that she sells online. The glass pane of the frame costs her $30.00. If the glass pane represents 12% of the cost to make a frame, how much money does it take for Angela to make one picture frame? $255
$350
$325
$250

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.