An isosceles right triangle is removed from each corner of a square piece of paper, as shown, to create a rectangle. if $ab = 12$ units, what is the combined area of the four removed triangles, in square units?

Hello, i need compare km^2 and km. what's difference in this?

Graph a point. start at your origin, move left 10 units, and then move up three units which ordered pair is the point you graphed

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.