I am doing a project for my teacher we have to do five buffers around schools in a town. The buffers are at 500, 1000, 1500, 2000, 2500 feet, I was wondering if there is away to do all of the disk buffers at once? And is there a short cut to figure out the square mile different between each buffer. With out having to join and unjoin every buffer and doing feild calculators. Attached is an example of what we are doing.