Vale Mountain has a snow making machine that will lay down an inch of snow per hour over an area of 50000 square feet. Which expression shows how to find the number of hours this machine takes to lay down 1 inch of new snow on a ski run that is 700 feet long and 120 feet wide?
A. (700x120)/50,000 B. 50,000/(700x120) C. 120x50,000/700 D. (700x50,000)/120