Little tikes is currently trying to plan a new sandbox for children. one sandbox they already have is a square and they are adjusting it so that one side is tripled in length and the other side is decreased by 10 meters. the new rectangular sandbox will have an area that is so more than the original square sandbox s area. a) write an equation that could be used to determine the length of a side of the original square sandbox. b) explain how your equation models the situation. c) determine the area, in square meters, of the new rectangular garden.