This is a nice way to represent the
solution. I was going to comment that she didn't tell us how she got
her answer, but then I couldn't figure out how I would explain
I'd love it if someone would come up with a
really good way of writing about the solution either to (a) convince
me that it was right or (b) explain how you checked or (c) explain
how you got it or (d) discuss multiple solutions...
Send your solutions to
You can even send another solution to this same
problem if you'd like!